The rules require most nations to obtain licenses for building AI data centers using U.S. chips, while providing unrestricted access to 18 allied countries. Nvidia Corp. NVDA, which controls approximately 90% of the AI chip market, saw its shares drop 3% following the announcement. Advanced Micro Devices Inc. AMD fell 2% in response to the restrictions. "This rule threatens to derail innovation and economic growth worldwide," said Nvidia's VP of government affairs, Ned Finkle, in a statement on Monday. The pending regulations could particularly impact companies like Lam Research Corp. LRCX, potentially reversing earlier interpretations that had allowed hundreds of millions in additional revenue from Chinese memory chip makers, according to the report.