Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth_老虎社区_美港股上老虎

Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth

Market Wacth2021-11-08

November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points. Such a gain would take the U.S. stock market bellwether to...

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175

Kamarulzaman
·2021-11-08
November . Bullish guys
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1
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Uasbau
·2021-11-08
Infos
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1
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MHh
·2021-11-08
If it continues to rally, great!
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8
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- MHh:
  [Smile]
  2021-11-09
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- Huathk:
  Gd
  2021-11-08
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Galaxy88
·2021-11-08
Ok
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bobsk
·2021-11-08
Cant agree more. You can manipulate stats to tell u anything u want in the market. I still rmb an article saying that september was going to be fine because of 'historical analysis' when overall growth rate was high and september was just all reds
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Sunny_Bee
·2021-11-08
Agree with the author. When the reporter tells you that it is the best month of the year, maybe the best month is already over. Lol.
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BalancingAct
·2021-11-08
Well said...all these analysts tend to twist and rely too much on stats data which we know can be interpreted in a number of ways if you know how to present your side of the story. Every year is different and one needs to feel the ground as it plays out not after it played out then give reason or rationale ,"I said it so" . Happy investing and trading
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- Meroy:
  to be honest, investment is not all about analysis, fortune and time are also very important💕
  2021-11-08
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- DaisyMoore:
  I agree with you very much. Analysts usually have good professional knowledge and solid analytical ability. Their views are very important to guide public investment. Rather than reading a lot of financial data and news every day, I prefer to directly look at the analysis conclusions of analysts.
  2021-11-08
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- PagRobinson:
  Analysts will analyze past data to give their assessment and views on the company, and then guide their investment in the future. I think the views of analysts are very important. After all, no one can accurately predict the change of stock price.
  2021-11-08
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Slee49
·2021-11-08
Good read
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2
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- Slee49:
  Like
  2021-11-08
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Milliondream
·2021-11-08
The options trend could be because of positive retail traders, while usually the bulls welcome the new year, we are in early Novemberand I would rather be cautious than be all guns out.
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koolgal
·2021-11-08
US stocks seem to make November a great month so far as all the 3 indexes have been breaking records! Hopefully the Santa rally will be sustained right through Christmas! HHo Ho Ho, it will be a MERRY Christmas! 🎉🎊🎉🚀🚀🚀
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- koolgal:
  Yes that is true. Thanks for sharing
  2021-11-09
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- 56a3dd2f:
  So far so good, most of the stocks are holding well 😊👍
  2021-11-09
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- koolgal:
  Yes I wish I am there too.
  2021-11-09
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VinKuang
·2021-11-08
Like pls [开心]
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8
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- JeremyKok:
  hi. please like and comment back. thank you.
  2021-11-09
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- 57e0002a:
  ok
  2021-11-08
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- WalkerWoon:
  like me too
  2021-11-08
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CIG
·2021-11-08
Have you watched The November Man?
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Victorhc88
·2021-11-08
Like pls
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- JeremyKok:
  hi. please like and comment back. thank you.
  2021-11-09
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- TTH4Legs:
  Liked
  2021-11-08
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}\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">网页链接</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","isBrief":false,"type":0,"news_type":1,"symbol":null,"symbol_name":null,"start_time":0,"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","article_id":"1156505839","we_media_id":null,"thumbnails":[],"rights":null,"url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","pubTimestamp":1636344323,"sourceInfo":{"source_id":"lsy1604288433698","name":"Market Wacth"},"weMediaInfo":null,"summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","collect":0,"end_time":0,"defaultTopTitle":"marketwatch.com","property":[],"viewcount":null,"language":"en","relate_stocks":{},"translate_title":"观点：华尔街会告诉你，股市在11月会大放异彩，但这是一个不加掩饰的事实","themeId":null,"isJumpTheme":false,"ttsUrl":null,"symbols_score_info":{},"content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","kind":null,"is_publish_news":false,"is_publish_highlight":true,"is_publish_live":null,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"0","news_tag":"","news_rank":0,"symbols":[],"gpt_button":1},"commentList":[{"id":845750787,"gmtCreate":1636370808575,"gmtModify":1636370808684,"author":{"id":"4097645376190010","authorId":"4097645376190010","name":"Kamarulzaman","avatar":"https://static.tigerbbs.com/fdd904f47ea24aec7b14f7a88bfdd544","vip":1,"crmLevel":1,"crmLevelSwitch":0},"htmlText":"November . Bullish guys","listText":"November . Bullish guys","text":"November . Bullish guys","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":1,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845750787","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845717436,"gmtCreate":1636368053436,"gmtModify":1636368054029,"author":{"id":"3581724772671504","authorId":"3581724772671504","name":"Uasbau","avatar":"https://static.tigerbbs.com/67cdf409f2239595269918513a5faac9","vip":1,"crmLevel":2,"crmLevelSwitch":0},"htmlText":"Infos","listText":"Infos","text":"Infos","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":1,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845717436","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845710880,"gmtCreate":1636367238462,"gmtModify":1636367242048,"author":{"id":"4091758936365950","authorId":"4091758936365950","name":"MHh","avatar":"https://static.tigerbbs.com/54b2feced9ef5dcc9e95997d1f4db280","vip":1,"crmLevel":6,"crmLevelSwitch":0},"htmlText":"If it continues to rally, great!","listText":"If it continues to rally, great!","text":"If it continues to rally, great!","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":8,"commentSize":2,"repostSize":0,"link":"https://laohu8.com/post/845710880","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6503522,"gmtCreate":1636410200728,"gmtModify":1636410200837,"authorId":4091758936365950,"author":{"id":4091758936365950,"authorId":4091758936365950,"name":"MHh","avatar":"https://static.tigerbbs.com/54b2feced9ef5dcc9e95997d1f4db280","vip":1,"crmLevel":6,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845710880,"type":1,"supId":6500594,"prevId":0,"content":"[Smile]","text":"[Smile]","html":"[Smile]"},{"id":6500594,"gmtCreate":1636380377021,"gmtModify":1636385022830,"authorId":3573472992263411,"author":{"id":3573472992263411,"authorId":3573472992263411,"name":"Huathk","avatar":"https://static.tigerbbs.com/43c7168c646d9ea6805194ed0003f1cc","vip":1,"crmLevel":5,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845710880,"type":1,"supId":0,"prevId":0,"content":" Gd","text":" Gd","html":" Gd"}],"langContent":"CN"},{"id":845490396,"gmtCreate":1636357746608,"gmtModify":1636357768039,"author":{"id":"4091842669394280","authorId":"4091842669394280","name":"Galaxy88","avatar":"https://static.laohu8.com/default-avatar.jpg","vip":1,"crmLevel":4,"crmLevelSwitch":0},"htmlText":"Ok","listText":"Ok","text":"Ok","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":5,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845490396","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845569517,"gmtCreate":1636352045473,"gmtModify":1636352270167,"author":{"id":"3583206503018157","authorId":"3583206503018157","name":"bobsk","avatar":"https://static.tigerbbs.com/de805e0ba0f6207aca22cf1f4d68192f","vip":1,"crmLevel":3,"crmLevelSwitch":0},"htmlText":"Cant agree more. You can manipulate stats to tell u anything u want in the market. I still rmb an article saying that september was going to be fine because of 'historical analysis' when overall growth rate was high and september was just all reds","listText":"Cant agree more. You can manipulate stats to tell u anything u want in the market. I still rmb an article saying that september was going to be fine because of 'historical analysis' when overall growth rate was high and september was just all reds","text":"Cant agree more. You can manipulate stats to tell u anything u want in the market. I still rmb an article saying that september was going to be fine because of 'historical analysis' when overall growth rate was high and september was just all reds","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":5,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845569517","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845581587,"gmtCreate":1636351327853,"gmtModify":1636351328300,"author":{"id":"4094200026092470","authorId":"4094200026092470","name":"Sunny_Bee","avatar":"https://static.tigerbbs.com/c1a82fcc3056cf5e54f42c722e19a7c4","vip":1,"crmLevel":2,"crmLevelSwitch":0},"htmlText":"Agree with the author. When the reporter tells you that it is the best month of the year, maybe the best month is already over. Lol.","listText":"Agree with the author. When the reporter tells you that it is the best month of the year, maybe the best month is already over. Lol.","text":"Agree with the author. When the reporter tells you that it is the best month of the year, maybe the best month is already over. Lol.","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":4,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845581587","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845580155,"gmtCreate":1636350934036,"gmtModify":1636350934036,"author":{"id":"4094806265294780","authorId":"4094806265294780","name":"BalancingAct","avatar":"https://static.laohu8.com/default-avatar.jpg","vip":1,"crmLevel":3,"crmLevelSwitch":0},"htmlText":"Well said...all these analysts tend to twist and rely too much on stats data which we know can be interpreted in a number of ways if you know how to present your side of the story. Every year is different and one needs to feel the ground as it plays out not after it played out then give reason or rationale ,\"I said it so\" . Happy investing and trading","listText":"Well said...all these analysts tend to twist and rely too much on stats data which we know can be interpreted in a number of ways if you know how to present your side of the story. Every year is different and one needs to feel the ground as it plays out not after it played out then give reason or rationale ,\"I said it so\" . Happy investing and trading","text":"Well said...all these analysts tend to twist and rely too much on stats data which we know can be interpreted in a number of ways if you know how to present your side of the story. Every year is different and one needs to feel the ground as it plays out not after it played out then give reason or rationale ,\"I said it so\" . Happy investing and trading","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":5,"commentSize":3,"repostSize":0,"link":"https://laohu8.com/post/845580155","repostId":1156505839,"repostType":2,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6499372,"gmtCreate":1636374410203,"gmtModify":1636374410203,"authorId":9000000000000482,"author":{"id":9000000000000482,"authorId":9000000000000482,"name":"Meroy","avatar":"https://static.tigerbbs.com/a70f12c6c7ca3e0f00f4b8fb561c5998","vip":8,"crmLevel":1,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845580155,"type":1,"supId":0,"prevId":0,"content":"to be honest, investment is not all about analysis, fortune and time are also very important💕","text":"to be honest, investment is not all about analysis, fortune and time are also very important💕","html":"to be honest, investment is not all about analysis, fortune and time are also very important💕"},{"id":6496673,"gmtCreate":1636354469383,"gmtModify":1636354469383,"authorId":9000000000000640,"author":{"id":9000000000000640,"authorId":9000000000000640,"name":"DaisyMoore","avatar":"https://static.tigerbbs.com/0b6d4586dc3002807c92bc57e1b3a6bd","vip":8,"crmLevel":1,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845580155,"type":1,"supId":6496632,"prevId":0,"content":"I agree with you very much. Analysts usually have good professional knowledge and solid analytical ability. Their views are very important to guide public investment. Rather than reading a lot of financial data and news every day, I prefer to directly look at the analysis conclusions of analysts.","text":"I agree with you very much. Analysts usually have good professional knowledge and solid analytical ability. Their views are very important to guide public investment. Rather than reading a lot of financial data and news every day, I prefer to directly look at the analysis conclusions of analysts.","html":"I agree with you very much. Analysts usually have good professional knowledge and solid analytical ability. Their views are very important to guide public investment. Rather than reading a lot of financial data and news every day, I prefer to directly look at the analysis conclusions of analysts."},{"id":6496632,"gmtCreate":1636354128191,"gmtModify":1636354128191,"authorId":9000000000000432,"author":{"id":9000000000000432,"authorId":9000000000000432,"name":"PagRobinson","avatar":"https://static.tigerbbs.com/f27744c1fabf17b5f44122ab53e7da10","vip":8,"crmLevel":1,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845580155,"type":1,"supId":0,"prevId":0,"content":"Analysts will analyze past data to give their assessment and views on the company, and then guide their investment in the future. I think the views of analysts are very important. After all, no one can accurately predict the change of stock price.","text":"Analysts will analyze past data to give their assessment and views on the company, and then guide their investment in the future. I think the views of analysts are very important. After all, no one can accurately predict the change of stock price.","html":"Analysts will analyze past data to give their assessment and views on the company, and then guide their investment in the future. I think the views of analysts are very important. After all, no one can accurately predict the change of stock price."}],"langContent":"CN"},{"id":845512260,"gmtCreate":1636350395229,"gmtModify":1636350396044,"author":{"id":"3581993357014262","authorId":"3581993357014262","name":"Slee49","avatar":"https://static.tigerbbs.com/a4a9c556617a3ec3446f5c1c667b4aa0","vip":1,"crmLevel":5,"crmLevelSwitch":0},"htmlText":"Good read","listText":"Good read","text":"Good read","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":2,"commentSize":1,"repostSize":0,"link":"https://laohu8.com/post/845512260","repostId":1156505839,"repostType":2,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6496175,"gmtCreate":1636350404803,"gmtModify":1636350404832,"authorId":3581993357014262,"author":{"id":3581993357014262,"authorId":3581993357014262,"name":"Slee49","avatar":"https://static.tigerbbs.com/a4a9c556617a3ec3446f5c1c667b4aa0","vip":1,"crmLevel":5,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845512260,"type":1,"supId":0,"prevId":0,"content":"<u>Like</u>","text":"<u>Like</u>","html":"<u>Like</u>"}],"langContent":"CN"},{"id":845595116,"gmtCreate":1636348310154,"gmtModify":1636348310870,"author":{"id":"3559283513621894","authorId":"3559283513621894","name":"Milliondream","avatar":"https://static.tigerbbs.com/2a00e2718679bd499f27764a78342e5c","vip":1,"crmLevel":8,"crmLevelSwitch":0},"htmlText":"The options trend could be because of positive retail traders, while usually the bulls welcome the new year, we are in early Novemberand&nbsp;I would rather be cautious than be all guns out.","listText":"The options trend could be because of positive retail traders, while usually the bulls welcome the new year, we are in early Novemberand&nbsp;I would rather be cautious than be all guns out.","text":"The options trend could be because of positive retail traders, while usually the bulls welcome the new year, we are in early Novemberand I would rather be cautious than be all guns out.","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":5,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845595116","repostId":1156505839,"repostType":2,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845590689,"gmtCreate":1636347687380,"gmtModify":1636415054945,"author":{"id":"3559581955535845","authorId":"3559581955535845","name":"koolgal","avatar":"https://static.tigerbbs.com/c05274d88ffc0434623e57350c52c70a","vip":2,"crmLevel":6,"crmLevelSwitch":0},"htmlText":"US stocks seem&nbsp;to make November a great month so far&nbsp;as all the 3 indexes have been breaking records!&nbsp; Hopefully the Santa rally will be sustained right through Christmas! HHo Ho Ho, it will be a MERRY Christmas! 🎉🎊🎉🚀🚀🚀","listText":"US stocks seem&nbsp;to make November a great month so far&nbsp;as all the 3 indexes have been breaking records!&nbsp; Hopefully the Santa rally will be sustained right through Christmas! HHo Ho Ho, it will be a MERRY Christmas! 🎉🎊🎉🚀🚀🚀","text":"US stocks seem to make November a great month so far as all the 3 indexes have been breaking records! Hopefully the Santa rally will be sustained right through Christmas! HHo Ho Ho, it will be a MERRY Christmas! 🎉🎊🎉🚀🚀🚀","images":[],"top":1,"highlighted":2,"essential":1,"paper":1,"likeSize":23,"commentSize":12,"repostSize":0,"link":"https://laohu8.com/post/845590689","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6510796,"gmtCreate":1636450282925,"gmtModify":1636450282925,"authorId":3559581955535845,"author":{"id":3559581955535845,"authorId":3559581955535845,"name":"koolgal","avatar":"https://static.tigerbbs.com/c05274d88ffc0434623e57350c52c70a","vip":2,"crmLevel":6,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845590689,"type":1,"supId":6506865,"prevId":0,"content":"Yes that is true.&nbsp; Thanks for sharing","text":"Yes that is true.&nbsp; Thanks for sharing","html":"Yes that is true.&nbsp; Thanks for sharing"},{"id":6506865,"gmtCreate":1636421581092,"gmtModify":1636421581123,"authorId":3563664364598207,"author":{"id":3563664364598207,"authorId":3563664364598207,"name":"56a3dd2f","avatar":"https://community-static.tradeup.com/news/default-avatar.jpg","vip":1,"crmLevel":2,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845590689,"type":1,"supId":0,"prevId":0,"content":"So far so good, most of the stocks are holding well 😊👍","text":"So far so good, most of the stocks are holding well 😊👍","html":"So far so good, most of the stocks are holding well 😊👍"},{"id":6504862,"gmtCreate":1636415054900,"gmtModify":1636415054900,"authorId":3559581955535845,"author":{"id":3559581955535845,"authorId":3559581955535845,"name":"koolgal","avatar":"https://static.tigerbbs.com/c05274d88ffc0434623e57350c52c70a","vip":2,"crmLevel":6,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845590689,"type":1,"supId":6504521,"prevId":0,"content":"Yes I wish I am there too.","text":"Yes I wish I am there too.","html":"Yes I wish I am there too."},{"id":6504521,"gmtCreate":1636414180975,"gmtModify":1636414181072,"authorId":4096368443831390,"author":{"id":4096368443831390,"authorId":4096368443831390,"name":"b1uesky","avatar":"https://static.tigerbbs.com/87ef9b02e19a8acfaa7ae5b147b70882","vip":1,"crmLevel":2,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845590689,"type":1,"supId":0,"prevId":0,"content":"it is holiday season. there will be a lot travelling around usa and Europe","text":"it is holiday season. there will be a lot travelling around usa and Europe","html":"it is holiday season. there will be a lot travelling around usa and Europe"},{"id":6498200,"gmtCreate":1636365786114,"gmtModify":1636365786114,"authorId":3559581955535845,"author":{"id":3559581955535845,"authorId":3559581955535845,"name":"koolgal","avatar":"https://static.tigerbbs.com/c05274d88ffc0434623e57350c52c70a","vip":2,"crmLevel":6,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845590689,"type":1,"supId":6498094,"prevId":0,"content":"Thanks","text":"Thanks","html":"Thanks"}],"langContent":"CN"},{"id":845507260,"gmtCreate":1636347576224,"gmtModify":1636347576566,"author":{"id":"3577323914202336","authorId":"3577323914202336","name":"VinKuang","avatar":"https://static.tigerbbs.com/536d624e5750dcffec704eeed9bc003b","vip":1,"crmLevel":5,"crmLevelSwitch":0},"htmlText":"Like pls&nbsp;[开心]&nbsp;","listText":"Like pls&nbsp;[开心]&nbsp;","text":"Like pls [开心]","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":8,"commentSize":3,"repostSize":0,"link":"https://laohu8.com/post/845507260","repostId":1156505839,"repostType":2,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6504473,"gmtCreate":1636414039293,"gmtModify":1636414039326,"authorId":3567307840510045,"author":{"id":3567307840510045,"authorId":3567307840510045,"name":"JeremyKok","avatar":"https://static.tigerbbs.com/01b03a485f83b6b2615fad8ac9b87bf4","vip":1,"crmLevel":5,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845507260,"type":1,"supId":0,"prevId":0,"content":"hi. please like and comment back. thank you.","text":"hi. please like and comment back. thank you.","html":"hi. please like and comment back. thank you."},{"id":6495944,"gmtCreate":1636349438095,"gmtModify":1636349438126,"authorId":3582431165926620,"author":{"id":3582431165926620,"authorId":3582431165926620,"name":"57e0002a","avatar":"https://static.laohu8.com/default-avatar.jpg","vip":1,"crmLevel":2,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845507260,"type":1,"supId":0,"prevId":0,"content":"ok","text":"ok","html":"ok"},{"id":6495752,"gmtCreate":1636348207090,"gmtModify":1636348207183,"authorId":3567211702241491,"author":{"id":3567211702241491,"authorId":3567211702241491,"name":"WalkerWoon","avatar":"https://static.tigerbbs.com/a772c81a4c88b39f7cdec13c1c0af077","vip":1,"crmLevel":5,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845507260,"type":1,"supId":0,"prevId":0,"content":"like me too","text":"like me too","html":"like me too"}],"langContent":"CN"},{"id":845505194,"gmtCreate":1636347170369,"gmtModify":1636347171474,"author":{"id":"3583974841960176","authorId":"3583974841960176","name":"CIG","avatar":"https://static.tigerbbs.com/6c2077e2370e1ffcaca7e29b875be2be","vip":1,"crmLevel":5,"crmLevelSwitch":0},"htmlText":"Have you watched The November Man?","listText":"Have you watched The November Man?","text":"Have you watched The November Man?","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":5,"commentSize":0,"repostSize":0,"link":"https://laohu8.com/post/845505194","repostId":1156505839,"repostType":2,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"langContent":"CN"},{"id":845247975,"gmtCreate":1636345337405,"gmtModify":1636345338118,"author":{"id":"3582248650466523","authorId":"3582248650466523","name":"Victorhc88","avatar":"https://static.tigerbbs.com/d72a1d9498132424b1eddb4db3c77265","vip":1,"crmLevel":2,"crmLevelSwitch":0},"htmlText":"Like pls","listText":"Like pls","text":"Like pls","images":[],"top":1,"highlighted":1,"essential":1,"paper":1,"likeSize":14,"commentSize":2,"repostSize":0,"link":"https://laohu8.com/post/845247975","repostId":1156505839,"repostType":4,"repost":{"id":"1156505839","pubTimestamp":1636344323,"share":"https://www.laohu8.com/m/news/1156505839?lang=&edition=full","pubTime":"2021-11-08 12:05","market":"us","language":"en","title":"Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth","url":"https://stock-news.laohu8.com/highlight/detail?id=1156505839","media":"Market Wacth","summary":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be ex","content":"<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.</p>\n<p>Such a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.</p>\n<p>You shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.</p>\n<p>It’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.</p>\n<p>Consider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”</p>\n<p>This raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?</p>\n<p>Unless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.</p>\n<p>The Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th&nbsp;for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.</p>\n<p><img src=\"https://static.tigerbbs.com/81a13b9bba8ec5e47cf1c0ed3172447f\" tg-width=\"700\" tg-height=\"471\" referrerpolicy=\"no-referrer\"></p>\n<p>How about November being the second-best month in post-presidential election years? Again, this is true for only <a href=\"https://laohu8.com/S/AONE.U\">one</a> subset of the historical data. Viewed over the Dow’s entire history, November is in 6th&nbsp;place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.</p>\n<p>I don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.</p>\n<p><b>Playing the odds</b></p>\n<p>There’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.</p>\n<p>In all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.</p>\n<p>Ideally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.</p>\n<p>This, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&amp;P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)</p>\n<p>Brad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.</p>\n<p>Remember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.</p>","source":"lsy1604288433698","collect":0,"html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>Opinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nOpinion: Wall Street will tell you that stocks shine in November but here’s the unvarnished truth\n</h2>\n\n<h4 class=\"meta\">\n\n\n2021-11-08 12:05 GMT+8&nbsp;&nbsp;&nbsp;<a href=https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page><strong>Market Wacth</strong></a>\n\n\n</h4>\n\n</header>\n<article>\n<div>\n<p>November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to...</p>\n\n<a href=\"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page\">Web Link</a>\n\n</div>\n\n\n</article>\n</div>\n</body>\n</html>\n","type":0,"thumbnail":"","relate_stocks":{},"source_url":"https://www.marketwatch.com/story/wall-street-will-tell-you-that-stocks-shine-in-november-but-heres-the-unvarnished-truth-11635872739?mod=home-page","is_english":true,"share_image_url":"https://static.laohu8.com/e9f99090a1c2ed51c021029395664489","article_id":"1156505839","content_text":"November likely will be a good month for the Dow Jones Industrial AverageDJIA,+0.56%,which can be expected to gain 0.6%, or about 220 points.\nSuch a gain would take the U.S. stock market bellwether to around the 36,040 level, versus the 35,820 level at which it finished the month of October. Were you hoping for more? After all, the Dow rose almost 6% in October.\nYou shouldn’t be surprised. The Dow’s expected gain this month is the same as it is every other month of the calendar. There is no reason for November to be any better or worse than the historical average.\nIt’s important to point this out to counter those on Wall Street who mine the historical data in search of “uncanny” seasonal patterns. The only real investment lesson we can learn from their efforts is that if you torture the data long and hard enough you can make it say almost anything.\nConsider the claims that the chief investment officer of a major Wall Street firm emailed to clients last week: “November has been quite strong historically. In fact, since 1950, and the past 10 years, it is the best month of the year, while it ranks second over the past 20 years and during a post-election year. November is the best month of the year, but it doesn’t seem to get nearly as much love as you’d think. We all assume December is the best month, but November is actually better and gets very little fanfare.”\nThis raises several red flags. Why choose the period since 1950, as opposed to, say, 1960 or 1940? Why focus on just the past 10- or 20 years and not the past 13 or 23 or 27?\nUnless there is a compelling theoretical reason to focus on a subset of the historical data, doing so suggests that deliberate data mining is going on.\nThe Dow offers investors monthly data extending back to its creation in May 1896. Over the ensuing 125 years, November’s average return ranks 5th for all years, as you can see in the chart below. November is slightly above average, but not at the 95% confidence level that statisticians often use when determining if a pattern is genuine. In fact, it isn’t even close.\n\nHow about November being the second-best month in post-presidential election years? Again, this is true for only one subset of the historical data. Viewed over the Dow’s entire history, November is in 6th place for average performance during post-presidential election years. In other words, its performance rank in such years is actually slightly worse than in the entire sample.\nI don’t mean to pick on this particular well-known Wall Street CIO, which is why I am not naming him. He actually is in good company.\nPlaying the odds\nThere’s an even more fundamental problem with this data mining, beyond their lack of statistical significance: To get historical odds reasonably in your favor when betting on a seasonal pattern, you would have to bet on it consistently many times in a row — several dozen at a minimum. So when betting on a pattern that comes around only once every year, the intelligent bet lasts several decades. The odds of success in any given year are only barely above a coin flip.\nIn all Novembers since 1896, for example, the Dow has risen 63% of the time. Even assuming the future will be like the past, a bet that the stock market will gain ground in November will be wrong slightly more than one out of every three years. That’s far too much risk to justify throwing caution to the wind.\nIdeally, from a statistical point of view, you can find statistically significant patterns that are extremely short term. That would allow you, with even a relatively brief holding period, to bet on those patterns a sufficient number of times to get the odds decently in your favor.\nThis, for example, is the secret behind the phenomenally successful Medallion Fund, from Renaissance Technologies, which (even after fees) beat the S&P 500SPX,+0.37%between 1988 and 2018 by the incredible margin of 39.2% annualized return to 10.0%. (The fund is not available to outside investors.)\nBrad Cornell, a professor emeritus at UCLA, reportsthat the odds of success of any of Medallion Fund’s individual trades have been 50.75%, only slightly higher than 50%. But when coupled with high-frequency trading, those odds are enough to produce a highly profitable strategy. Medallion’s “strategy involved constantly opening and covering thousands of short-term positions, both long and short… Taken over millions of trades that [50.75%] percentage allowed the firm to make billions,” Cornell wrote.\nRemember this the next time you read about an alleged seasonal pattern in the stock market. Even when that pattern is statistically significant, which is rare, it won’t help you much over the long term.","news_type":1},"isVote":1,"likeStatus":false,"favoriteStatus":false,"reportStatus":false,"tweetType":1,"comments":[{"id":6504476,"gmtCreate":1636414049214,"gmtModify":1636414049244,"authorId":3567307840510045,"author":{"id":3567307840510045,"authorId":3567307840510045,"name":"JeremyKok","avatar":"https://static.tigerbbs.com/01b03a485f83b6b2615fad8ac9b87bf4","vip":1,"crmLevel":5,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845247975,"type":1,"supId":0,"prevId":0,"content":"hi. please like and comment back. thank you.","text":"hi. please like and comment back. thank you.","html":"hi. please like and comment back. thank you."},{"id":6496261,"gmtCreate":1636350980176,"gmtModify":1636350980270,"authorId":3576220386239608,"author":{"id":3576220386239608,"authorId":3576220386239608,"name":"TTH4Legs","avatar":"https://static.laohu8.com/default-avatar.jpg","vip":1,"crmLevel":2,"crmLevelSwitch":0,"individualDisplayBadges":[]},"repliedAuthorId":0,"objectId":845247975,"type":1,"supId":0,"prevId":0,"content":"Liked","text":"Liked","html":"Liked"}],"langContent":"CN"}],"hasMoreComments":true,"newsSizeData":{"likeSize":175,"commentSize":13,"repostSize":0,"favoriteSize":6,"likeStatus":false,"favoriteStatus":false}}