TOKYO: 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.
Meanwhile, the dollar rose after U.S. President Donald Trump threatened Colombia with retaliatory levies and sanctions for turning away military aircraft carrying deported migrants before a last-minute deal was agreed.
U.S. Nasdaq Composite futures tumbled 2.3% as of 0634 GMT and S&P 500 futures sank 1.3%.
Japan's Nikkei dropped 0.9%, reversing an initial advance. New Zealand's equity benchmark slipped 0.2% and Singapore's Straits Times index eased 0.1%.
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