Nvidia shares plunged Monday amid concerns that a powerful, cost-efficient AI model developed by Chinese startup DeepSeek ...

The emergence of China-based AI app DeepSeek sent shares plummeting on Monday for many U.S. tech giants, including chipmaker Nvidia and AI-backer Microsoft.

The company is facing pressure on two fronts—the government and a host of new AI-powered search rivals. It has the capacity to meet both challenges and continue to prosper.

Corporate bond investors have been trimming their holdings of bonds issued by the "Magnificent Seven," with one exception, since the November presidential election, a trend that has continued into the ...