A surprise development may have turned the market for artificial intelligence (AI) chips on its head. DeepSeek, a China-based start-up, developed an open-source large language model, claiming it took two months and cost less than $6 million.

Stocks rose Friday as Apple led a broad rally following a strong investor reaction to its quarterly earnings report and the market closes out a whirlwind week highlighted by Nvidia’s record-breaking losses in reaction to China’s DeepSeek cheaper AI model and a flurry of earnings reports.

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Global investors staged a broad selloff in technology stocks on Monday, wiping out a staggering $593B in market value from Nvidia — an unprecedented one-day loss for any firm on Wall Street.