The S&P 500 and the Nasdaq fell sharply on Monday, led by Nvidia and other chipmakers as popularity of a low-cost Chinese artificial intelligence model raised investor worries about the outlooks for current AI leaders in the United States.

American AI stocks got sucker punched after China's DeepSeek app reportedly showed advancements against rivals sending investors into sell mode, shaving 3% off the Nasdaq.

DeepSeek has claimed it took just two months and cost under $6 million to build an AI model using Nvidia's less-advanced H800 chips. An app powered by the V3 model became the top iPhone download in the U.