Emergence Of Chinese AI App DeepSeek Causes US Tech Stock To Tumble

BATH, UNITED KINGDOM - JANUARY 29: In this photo illustration a smartphone screen displays the logo for the app for Chinese AI company DeepSeek alongside the logo for the ChatGPT app on January 29, 2025 in Bath, England. DeepSeek's free assistant chatbot emergence has caused huge doubt among investors in the value of US Silicon Valley competitors stock such as Nvidia, Meta Platforms, Microsoft, and Alphabet which many have said have been over-valued of late. The losses, the biggest drop in US stock market history, were blamed on the Chinese AI chatbot's use of lower-cost chips and that the free app uses less data at a fraction of the cost of its competitors language assistants. (Photo by Anna Barclay/Getty Images)