The Chinese-made app has wiped $1 trillion off the US stock market since its launch.
Major tech and AI-related stocks were down, including Nvidia, which fell more than 10%, while Microsoft, Meta, Google parent firm Alphabet and Amazon also all opened down on Monday.
The drop has been sparked by the sudden rise of Chinese AI chatbot app DeepSeek, which has jumped to the top of the download charts on the Apple app store in the UK, US and China, sparking a rethink of the landscape of the AI sector.
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