S&P 500 futures are little changed after index posts three straight losing days: Live updates CNBCWall Street closes down, pressured by tech losses and worries about rates ReutersMarkets News, October 23, 2024: Major Indexes Tumble as Tech Stocks Slide; Nasdaq’s 5-Day Winning Streak Snapped InvestopediaStock Market Today: Dow ends down over 400 points, S&P 500 suffers worst day in over 2 weeks MarketWatchDow tumbles 400 points, suffering worst day since early September: Live updates CNBC