Stock market today: Dow, S&P 500, Nasdaq fall as Alphabet stock sell-off drags on tech, AI jitters return

US stocks fell at the open on Thursday as Alphabet's Q3 earnings sparked a sell-off in the stock and AI jitters returned to markets, dragging on the tech-heavy indexes. The Dow Jones Industrial Average (^DJI) fell 0.4%, while the S&P 500 (^GSPC) lost 0.5%. The tech-heavy Nasdaq Composite (^IXIC) fell 1.6%. (^DJI ) Go deeper with AlphaSpace 52,252.90 -222.20 (-0.42%) As of 9:42:58 AM EDT. Market Open. ^DJI^GSPC ^IXIC Tech stocks snapped a positive run this week as investors digested the Fed's rate pause on Wednesday and earnings from Microsoft (MSFT) and Alphabet (GOOG, GOOGL). Microsoft beat analyst expectations on the top and bottom lines, while Alphabet sales came up short.