Wall Street’s superstars are tumbling Monday as a competitor from China threatens to upend the artificial-intelligence frenzy ...

The Nasdaq could face market-cap losses of nearly $1 trillion if premarket declines hold into the close of trading.

US stocks opened lower after Chinese startup DeepSeek's AI model shows AI can be built cheaply. That sparked fears AI spending will stall.

Markets have been rattled by claims by China's DeepSeek that its AI assistant uses cheaper chips and less data than leading ...

Explore the two reasons why the Nasdaq 100 and S&P 500 indices have crashed this week, including the Fed decision and ...

Market sentiment improved, but remained neutral on Friday. US stocks closed lower, with some tech stocks falling.

Nvidia, the leading chipmaker for AI applications, saw its stock plummet 11.7%, while a broader semiconductor index fell 6.5% ...