U.S. AI Chip Bans Trigger Chinese Tech Stock Rally

Tightened U.S. export bans on advanced AI chips under the Trump administration have sparked a significant market rally for domestic Chinese technology firms. Restrictions on U.S. companies like Nvidia Corporation and Advanced Micro Devices, Inc. have pushed Chinese buyers toward homegrown competitors, contributing to a 67% surge in the Hang Seng Tech Index during 2025.

Cambricon Technologies emerged as a primary beneficiary of this shift, reporting a 4,300% revenue increase to 2.88 billion yuan in the first half of 2025. Despite this growth, the company warned on August 28 that its soaring share price might deviate from fundamentals. Other firms gaining market share include SMIC, Hua Hong Semiconductor, Alibaba Group Holding Limited, and Tencent as Beijing pursues a localization strategy to reduce reliance on American technology.

While Washington recently allowed the sale of specific chips, such as the Nvidia H20, under a deal requiring a 15% revenue share with the U.S. government, further restrictions are planned. The U.S. government intends to revoke the special export licenses for the Taiwan Semiconductor Manufacturing Company facility in Nanjing by the end of the year.