S&P 500 rises slightly ahead of key Fed decision, Boeing shares jump

U.S. stocks edged higher on Wednesday, boosted by a few major companies on the back of their strong earnings, while investors awaited a key policy update from the Federal Reserve.

The S&P 500 rose 0.2% and the tech-heavy Nasdaq Composite climbed 0.4%. The Dow Jones Industrial Average gained 47 points.

Boeing shares climbed 5.6% after the manufacturer posted its first profit since the third quarter of 2019 thanks to a rebound in aircraft deliveries.

Investors also digested a host of quarterly results from megacap tech names. Google-parent Alphabet popped more than 4% after the tech giant posted quarterly results, registering a 69% jump in advertising revenue.

Apple shares dipped 2% even after the company beat top- and bottom-line estimates and said iPhone sales surged 50% year over year.Microsoft rose 1.2% after reporting an earnings beat despite a dip in revenue from its Windows division.

The Fed will conclude its two-day meeting on monetary policy Wednesday. The Federal Open Market Committee is set to release a statement at 2 p.m. ET followed by a press conference with Chairman Jerome Powell.

Investors are eager to get an update on the central bank's plans to start trimming its bond purchases, the first major step in tightening policy.Many Fed watchers expect that the spreading coronavirus delta variant will make the central bank sound more cautious on its economic outlook.

"We believe the Fed really wants to start to turn the corner on all of this excess accommodation but remains cautious on making sudden movements given how markets hang on nearly every word they say or action they take," said George Goncalves, head of U.S. macro strategy at MUFG.

The busiest week of earnings continues on Wednesday with Qualcomm,Facebook,Ford and PayPal among the names on deck. Of the S&P 500 companies that have reported quarterly results thus far, 89% have topped earnings estimates, while 86% have exceeded revenue expectations, according to data from Refinitiv.

The major averages are still on track to end the month higher. The S&P is up 2.4% for July, while the Nasdaq Composite and Dow have gained 1.1% and 1.6%, respectively.