The S&P 500 was down 1.6% in morning trading. Big Tech stocks took some of the heaviest losses, with Nvidia down 11.2%, and ...

The S&P 500 fell 1.9% Monday. Big Tech stocks took some of the heaviest losses, with Nvidia down 17.6%, and they dragged the ...

Investors dumped technology stocks in premarket trading Monday, sending U.S. indexes sharply lower after Chinese artificial intelligence startup DeepSeek demonstrated a chatbot that it says rivals the ...

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