US halts Nvidia chip shipments

The U.S. move reported by Reuters on May 31 targets a specific gap in semiconductor export controls: Chinese companies obtaining advanced AI chips through affiliates outside mainland China. The step centers on Nvidia products and similar advanced chips, and it extends Washington’s effort to stop diversion through overseas subsidiaries rather than direct shipments into China. The change matters because U.S. policy had already tightened sales to China itself, while leaving more room for transactions involving related entities abroad. ### Which loophole is Washington trying to close? The January 15, 2026 Federal Register rule already spelled out the core concern. BIS said it would keep a presumption of denial for exports to end-users located outside Macau or other restricted destinations if those entities are headquartered in Macau or a Country Group D:5 destination, which includes China. (federalregister.gov) That language matters because it treats corporate control and headquarters location as part of the export-control analysis, not just the shipping destination. In practice, that means a Chinese company’s overseas unit can trigger the same scrutiny as a buyer inside China if U.S. officials believe the chips could still support restricted Chinese AI capacity. (federalregister.gov) ### What chips are covered? BIS said on January 13 that license applications for Nvidia H200, AMD MI325X and similar advanced chips exported to China would be reviewed case by case if certain security conditions were met. The same rule left tougher treatment in place for related end-users outside China that are still tied to Chinese or Macau headquarters. (federalregister.gov) The January rule described the covered products in technical terms, including advanced computing commodities with thresholds that BIS said would include products such as the Nvidia H200 or AMD MI325X. Those chips are used in AI training and inference systems sold to cloud providers, enterprises and research customers. (bis.gov) ### Why does this hit Nvidia and AMD in particular? Nvidia and AMD are named directly in the BIS rule and press release, which makes them the clearest listed suppliers affected by the licensing framework. Reuters said the latest U.S. step was expected to pressure Nvidia and AMD shares because it narrows another path for selling advanced accelerators linked to Chinese demand. (bis.gov) A January 13 BIS statement said approved sales to China would require applicants to show that exports would not reduce semiconductor production capacity available to U.S. customers, that the Chinese purchaser had export-compliance procedures, and that the product had undergone independent U.S. testing for performance and security. Those conditions already made approvals narrower than ordinary commercial sales. (bis.gov) ### Is this a brand-new crackdown or an extension of earlier rules? The May 31 step looks like an extension of a broader tightening campaign rather than a standalone reset. BIS in January 2025 said it was strengthening restrictions on advanced computing semiconductors to prevent diversion to China, and BIS in August 2025 said it had closed another loophole involving foreign-owned semiconductor fabs in China. (bis.gov) The January 2026 rule then partially reopened a path for some direct China sales under case-by-case review, while preserving a presumption of denial for overseas entities tied to Chinese or Macau headquarters. Reuters’ account indicates Washington is now enforcing that overseas-affiliate restriction more explicitly. That is an inference from the rule text and Reuters’ description of the latest action. (bis.gov) ### What should companies watch next? BIS is the agency to watch for the next formal step, because its rules and guidance determine how license applications are reviewed and denied. Companies selling or buying advanced AI chips will be looking for updated enforcement guidance, licensing decisions and any further Federal Register notices that define how overseas affiliates are screened. The immediate benchmark remains the January 15, 2026 rule, which is already in effect and sets the current licensing posture for advanced computing exports tied to China and Macau. (federalregister.gov) Reuters’ May 31 report indicates that posture is now being applied more tightly to Chinese firms’ units outside China. (bis.gov)