(Bloomberg) — The United States unveiled new restrictions on China’s access to vital components for chips and AI, intensifying a campaign to contain Beijing’s technological ambitions but falling short of proposals previous decisions that would have sanctioned more key Chinese companies.

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The Commerce Department imposed new restrictions on the sale of high-bandwidth memory chips made by U.S. and foreign companies, likely affecting South Korean companies SK Hynix Inc. and Samsung Electronics Co. as well as Micron Technology Inc. , based in Idaho. storage and are essential for AI applications.

The agency also expanded existing controls on chipmaking equipment, including products made by U.S. companies in foreign facilities, but with exceptions for key allies, such as Japan and the Netherlands. It comes after months of negotiations between Washington, Tokyo and The Hague, during which Biden officials proposed — but ultimately did not pursue — applying U.S. controls to companies like Tokyo Electron Ltd. and ASML Holding NV.

Shares of U.S. semiconductor equipment companies, including Lam Research Corp., Applied Materials Inc. and KLA Corp., rebounded. In Asia, Tokyo Electron rose as much as 4.8%, while a group of blacklisted Chinese companies, including Naura Technology Group Co., fell. ASML said in a statement that it expects “no direct material impact” on its operations in 2024.

Some analysts have nevertheless warned of uncertain prospects from 2025.

“The United States has taken action and banned the sale of completed HBM chips to China, although this appears to have been largely anticipated,” Andrew Jackson of Ortus Advisors wrote in a note on Smartkarma. “With Trump arriving in January, the jubilation may be short-lived with a more hawkish administration on the horizon. »

The Biden administration’s goal, building on years of evolving trade restrictions, is to slow China’s domestic development of advanced semiconductors and artificial intelligence systems that could help its military. The United States will limit China’s “ability to produce technologies critical to its military modernization or repression of human rights,” the Ministry of Industry and Security’s Bureau of Industry and Security said in a statement. Commerce, which oversees export controls.

China strongly opposed the new restrictions on chips, criticizing the U.S. move as economic coercion that seriously threatened global supply chains. “The United States continues to generalize the concept of national security, abuse export control measures, and use unilateral intimidation,” the Commerce Department said in a statement Monday. “China will take necessary measures to resolutely safeguard its own rights and interests.”