On December 9, U.S. President Donald Trump announced the approval of NVIDIA's H200 AI chip exports to China with a 25% tariff, triggering a strong market reaction. Related A-share concept stocks opened higher, while domestic AI chip companies showed mixed performance.

Moore Threads (688795.SH) briefly dipped at the open before quickly rebounding, rising 3.22% to 613 yuan by press time. Other leading AI chip firms like Hygon Information (688041.SH) and Cambricon (688256.SH) posted modest gains with limited volatility.

The H200, NVIDIA's upgraded successor to the H100, features enhanced high-bandwidth memory for faster data processing and is considered critical for AI training and inference. Despite previous U.S. chip export restrictions, the H200 approval reflects strategic considerations for the Chinese market in AI chip development.

The A-share AI sector displayed divergence. NVIDIA's supply chain stocks surged at the open, with Shenghong Technology (300476.SZ) up over 6% and InnoLight Technology (300308.SZ) gaining more than 5%, hitting a record high of 603.28 yuan intraday. Inspur Information (000977.SZ), Shengyi Technology (600183.SH), and Kinwong Electronic (603228.SH) followed the upward trend.

For Chinese companies in NVIDIA's supply chain, the H200 export approval serves as a significant boost. The rally reflects market optimism about these firms gaining access to advanced chips to enhance product competitiveness, as they stand to benefit directly as NVIDIA's partners.

Market sentiment also lifted related AI segments, including optical circuit switches and high-speed copper connections. Shaanxi Huada (301517.SZ) surged by the 20% daily limit, Decent (688205.SH) jumped over 18%, and TTC (300570.SZ) rose more than 8%, all reaching recent highs.

In contrast, domestic GPU makers showed mixed performance, highlighting market uncertainty about their ability to replace NVIDIA chips and the industry's complex stance toward international competition and technology imports. In the short term, NVIDIA's H200 is likely to remain the mainstream choice for AI computing.

For A-share GPU manufacturers, the H200 export approval presents both challenges and opportunities. While increased NVIDIA chip supplies may intensify competition and squeeze domestic market share, they could also spur innovation and accelerate the development of China's AI chip industry.