US stock markets today: Dow Jones crashes 700 points, Nasdaq drops over 1% as AI worries spook investors by ET Markets | February 27, 2026 9:04 pm | Indian Stocks, Market, News Wall Street’s main indexes opened lower on Friday as AI anxiety dragged on tech stocks, with the Nasdaq bracing for its steepest monthly drop since March 2025, while hotter-than-expected inflation data also dampened sentiment.