NVIDIA, the world's most valuable company until Monday, lost $600 billion of market value in a single day, the biggest in US stock history.

Two U.S. Congress members are calling on President Donald Trump's administration to consider restricting the export of artificial intelligence chips made by Nvidia, alleging Chinese AI firm DeepSeek has relied on them.

Export controls need to be tightened after revelations the Chinese company used Nvidia technology, the leaders of a congressional committee said.

Shares of chipmaker Nvidia (NVDA) plummeted 17% on Monday and lost nearly $600 billion in market value. The decline was triggered by the

Chinese startup DeepSeek published a research paper in which it claimed to have trained a large language model rivaling the performance of leading U.S. models, while spending much less money than U.S.