Shares in AI-focused American tech giants, including Nvidia and Microsoft, fell on Monday after a China LLM shocked Silicon Valley.

DeepSeek topped the Apple App Store chart and sparked fears the Chinese company was quickly catching up with OpenAI's ChatGPT while costing far less.

The shocking success of a new model from a mysterious Chinese lab has America questioning its leadership of the sector.

Nvidia shares dropped in the biggest market cap loss ever recorded for an American company in a single day.

By Sinéad Carew, Amanda Cooper, Ankur Banerjee NEW YORK/LONDON/SINGAPORE (Reuters) -Investors sold technology stocks across the globe on Monday as they worried that the emergence of a low-cost Chinese artificial intelligence model would threaten the dominance of current AI leaders like Nvidia,

None more nervous than Nvidia, though, whose market cap plummeted in response to the hype over DeepSeek. According to Bloomberg, Nvidia lost a record $569 billion at the start of the week. Companies like Siemens Energy and Oracle also saw their stock prices fall.

U.S. stocks recovered some ground on Tuesday after getting hammered by fears over China's DeepSeek AI model built on a shoestring budget.