Nvidia shares' 9% recovery Tuesday was the second-best day in terms of market cap added for any company ever—but the company faced another selloff Wednesday.

Nvidia stock jumped in Europe on Wednesday, suggesting shares in the company at the heart of the artificial intelligence markets boom may recover further after a steep drop this week triggered by the rise of China's DeepSeek AI tool.

China’s DeepSeek says it trained an AI model for less than $6 million. This is as big U.S. tech companies have poured billions of dollars into AI chips and systems for their projects.

DeepSeek stunned the tech world with the release of its R1 "reasoning" model, matching or exceeding OpenAI's reasoning model for a fraction of the cost.

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.