Stock Market for July 27, 2026: Dow ends up 260 points and S&P 500 ekes out a gain; Nasdaq finishes lower on weakness in chips and tech stocks; Treasury yields and oil prices fall MarketWatchS&P 500 falls despite Iran fighting pause as chip stocks tumble: Live updates CNBCDow Jones Futures: U.S.-Iran Peace Hopes Send Oil Prices Plunging; Nvidia, Micron, Sandisk, SpaceX, Tesla Sell Off Investor's Business DailyStocks mixed, oil and Treasury yields drop on Iran-US pause Reut
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