US rules on American investment in Chinese AI

The U.S. Treasury proposed rules that would bar Americans from investing in Chinese companies developing any AI system. The current rule restricts investment only in the most powerful Chinese AI models while allowing smaller AI project funding with a reporting requirement; the proposal would eliminate that distinction and ban all such investments. The rules would also add high-bandwidth memory, photonic chips, and radiation-hardened chips to restricted chip categories, and extend prohibited sectors to include hypersonic weapons and biotech areas such as brain-computer interfaces and automated lab software. The geographic scope would expand from China alone to also cover Russia, Iran, North Korea, and Cuba. Deals under $50,000, purchases of publicly traded stocks, index funds, and small fund stakes up to $2 million would remain permitted. Treasury said it will not publish a list of banned companies, placing the compliance burden on individual investors. A public comment period is open until December 7, after which the final rule could still change.