Tokyo stocks ended mixed Monday as banks lifted on hopes for improved profits, while technology issues dropped on fears that U.S. dom

Wall Street is in turmoil with US tech giants bracing for significant losses as the stock market plummeted this morning, following the unexpected emergence of a Chinese rival in the AI chatbot space.

DeepSeek topped the Apple AppStore chart and sparked fears the Chinese company is quickly catching up with OpenAI's ChatGPT while costing far less.

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 of the cost.

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DeepSeek launched a free, open-source large language model in late December, claiming it was developed in just two months at a cost of under $6 million.

In currencies, the dollar jumped 0.3% against the Chinese yuan in offshore trading, and rallied 0.4% versus the Aussie and 0.5% versus the New Zealand dollar, with the antipodean currencies tending to act as more liquid proxies for China's currency due to close trade ties.

DeepSeek, which by Monday had overtaken U.S. rival ChatGPT in terms of downloads on the Apple Store, offers the prospect of a viable, cheaper AI alternative which has raised questions about the sustainability of the level of spending and investment on AI by Western companies, including Apple and Microsoft.

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LONDON/SINGAPORE (Reuters) -Investors hammered technology stocks on Monday, sending the likes of Nvidia and Oracle plummeting, as the emergence of a low-cost Chinese artificial intelligence model cast doubts on Western companies' dominance in this sector.

“It’s DeepSeek for sure,” said one Tokyo-based fund manager of the sudden drop in Japanese tech shares, adding that the market was readjusting to the idea that hardware spending on AI — a theme that had benefited certain Japanese companies — could be a lot lower than current estimates.