Tesla TSLA shares sold off on the news that DeepSeek, a Chinese AI company, released R1, an open-source reasoning model, ...

Tech stocks falling after small Chinese lab, DeepSeek, develops new AI model that challenges ChatGPT and Tesla; what to know.

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 ...