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29/09/2026 14:40

Yangtze Optical Fiber surges 8%, US reportedly plans to ban mainland optical modules, AI-related stocks plunge collectively yesterday

   After AI-related stocks plunged yesterday, they rebounded significantly today. Yangtze Optical Fiber & Cable (06869) is up 8.4%, trading at HK$168.6; Zhongji Shuangchuang (03308) is up 2.4%, trading at HK$1053; TianShu ZhiXin (09903) is up 8.3%, trading at HK$118.2; Zhaoyi Innovation (03986) is up 3.2%, trading at HK$462.6; Montage Technology (06809) is up 3.8%, trading at HK$296.

  Bipartisan members of the U.S. Congress jointly introduced a bill last Friday (25th), proposing to ban the federal government from using Chinese-made optical modules (optical transceivers) in government systems involving sensitive information, in order to reduce potential risks posed by such equipment to U.S. artificial intelligence data centers and government systems. The restriction under the bill includes optical modules produced by Chengdu Xinyi Sheng (Sz:300502) and Zhongji Shuangchuang. Previously, the U.S. Department of Defense had already placed Zhongji Shuangchuang and other companies on the "1260H list".

  Additionally, according to a report by U.S. tech media The Information citing sources, the Chinese government has signaled it may allow companies such as Alibaba (09988) and ByteDance to purchase NVIDIA's new RTX Pro 5500 chips. The report stated that recently, the Ministry of Industry and Information Technology requested some companies to report the quantity and purpose of planned RTX Pro 5500 purchases and indicated its intention to approve such purchases.

  The news dragged down AI-related stocks collectively yesterday, with Yangtze Optical Fiber & Cable plunging 16.6% yesterday to close at HK$155.5; Zhongji Shuangchuang fell 12.2% yesterday to HK$1028; TianShu ZhiXin dropped 11.4% yesterday to HK$109.1.

  Currently, the Hang Seng Index stands at 24,538, down 103 points or 0.4%, with main board turnover exceeding HK$126.2 billion. The Hang Seng China Enterprises Index is at 8,187, down 29 points or 0.4%. The Hang Seng Tech Index is at 4,248, down 47 points or 1.1%.
 
Table showing performance of related stocks
Stock (Code)Current Price (HK$)Change (%)
Yangtze Optical Fiber & Cable (06869)168.6Up 8.42%
Kingboard Laminate (01888)48.66Up 3.49%
Zhongji Shuangchuang (03308)1053Up 2.43%
Victory Giant Technology (02476)202.8Up 4.48%
Biren Technology (06082)37.18Up 6.11%
TianShu ZhiXin (09903)118.2Up 8.34%
Zhaoyi Innovation (03986)462.6Up 3.21%
Montage Technology (06809)296Up 3.79%
SMIC (00981)61.05No change
HHGrace (01347)106.9Up 1.52%
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