Wall Street Drops to Worst Day Since June as Tech Sell-Off Deepens

U.S. stock markets experienced their worst day since June, with the S&P 500 tumbling 1.8% and the Nasdaq Composite dropping 2.9%, as worries intensified that the frenzy around artificial-intelligence technology had sent prices too high. Intel's stock plunged 28.6% after a weaker-than-expected profit forecast, while Amazon fell 1.4% following a disappointing earnings report. Treasury yields fell despite higher oil prices, suggesting safe-haven demand.