Nvidia and other U.S. tech stocks are holding steadier Tuesday, a day after tumbling on doubts about whether the artificial-intelligence frenzy really needs all the dollars being poured into it. The S&P 500 was 0.

Investors around the world are reassessing the prospects for technology companies after a Chinese artificial intelligence start-up rocked markets in the United States on Monday.

Shares for leading US chip firm Nvidia dropped by almost 17% on Monday after the emergence of DeepSeek stunned Silicon Valley.

Entrepreneur Marc Andreessen, known for co-writing Mosaic, one of the world’s first web browsers, wrote Sunday on X that “DeepSeek R1 is AI’s Sputnik moment,” likening it to the space race between the U.S. and the Soviet Union and the event that forced the U.S. to realize that its technological abilities were not unassailable.

Silicon Valley venture capitalist Marc Andreessen has hailed DeepSeek as "one of the most amazing and impressive breakthroughs" in AI. The company says its latest AI models are on par with industry-leading models in the US - like ChatGPT - at a fraction of the cost.

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 top versions from OpenAI and Google for a fraction

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

U.S. stock futures and Asian shares outside China slumped on Monday as investors weighed the implications of Chinese startup DeepSeek's launch of a free, open-source artificial intelligence model to rival OpenAI's ChatGPT.