AI stock sell-off sends S&P 500 down 4.4% in worst day since April

Wall Street suffered a severe sell-off Thursday, led by AI-related stocks, with the S&P 500 falling 4.4% in its worst day since April 2025. The Dow dropped 1,833 points, and the Nasdaq tumbled 5.5%, entering correction territory. The decline was driven by concerns over slowing AI data center construction due to high borrowing costs and election results raising the possibility of government pauses. Nvidia fell 9.3%, while Advanced Micro Devices dropped 17.3%, with losses spreading globally. The sell-off erased the previous day's gains, which had been the market's best in three months. Treasury yields fell as investors sought safer assets, though some economic reports showed encouraging signs.