After China's DeepSeek prompts AI rethink, Nvidia stock slides. Follow along for live updates on stocks and other markets, including the Dow Jones Industrial Average, S&P 500 and Nasdaq Composite.

The Dow Jones sold off Monday as Nvidia stock plunged on an artificial intelligence threat from China known as DeepSeek.

Wall Street is tumbling Monday on fears that the market's winners who have feasted on the artificial-intelligence frenzy are under threat from a competitor in China that can do similar things for much ...