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Summit Therapeutics Inc. shares fell nearly 30% to $3.5 after the company said its Phase 3 Ri-CoDIFy

The S&P 500 notched another record high on Tuesday amid bullish economic data but retreated toward the flat line later in the session as Wall Street continued its recent period of low volatility.The broad market index ticked up less than 0.1% to 4,291.80, good enough for its fourth-straight record close. The Dow Jones Industrial Average finished with a gain of about 9 points after being up more than 100 points earlier in the session, closing at 34,292.29. The tech-heavy Nasdaq Composite added ab