FCC draft on Chinese optics jolts markets

The Federal Communications Commission is developing a measure that would bar imports of new models of Chinese optical transceivers used inside data centres. People familiar with the effort say officials hope to publish the rule this year, while emphasizing that it remains a draft that could still be modified or shelved before taking effect.

Descriptions of the proposal indicate it would focus on new transceiver models, rather than requiring the immediate removal of existing equipment already installed in U.S. facilities. The intent is to constrain future deployments of Chinese-made components in critical networking infrastructure.

The draft measure is framed as a response to national security concerns tied to the growing concentration of advanced computing in large data centres. Optical transceivers help move data through fiber-optic cables within these facilities, which house chips used to train and run artificial intelligence models.

Officials are seeking to reduce the risk that networking components could be used to steal data, install malware or disrupt services at these sites. By restricting new Chinese optical transceivers, the rule aims to limit potential exposure within key segments of U.S. digital and AI infrastructure.

News of the draft rule sparked notable share price gains among several U.S.-listed optical and component makers. Applied Optoelectronics rose about 16–18% in trading around August 4–5, while Coherent (COHR) advanced roughly 10–13%.

Lumentum shares gained about 7–11% and Corning (GLW) climbed around 8% in intraday or early trading over the same period. The moves reflected investor expectations that a restriction on new Chinese optical imports could benefit U.S. suppliers competing in the data-centre and networking markets.

In contrast, Chinese optical and data-centre component makers came under pressure after the draft measure became public. Zhongji Innolight, Eoptolink Technology and Suzhou TFC Optical Communications were reported trading sharply lower in early sessions.

Zhongji Innolight shares fell roughly 8% in both Shanghai and Hong Kong in early trading. The declines underscored concerns that a U.S. move against imports of new Chinese optical transceivers could weigh on future demand for these companies' products in the U.S. market.

Chinese authorities have urged the United States to heed the views of business communities in both countries as it considers new trade and security measures. Officials have stated that China would take all necessary measures in response to any action that causes material harm to its interests.

With the FCC proposal still in draft form, both policy and market outcomes remain uncertain. Investors and companies across the U.S. and Chinese optical supply chains are watching for further detail on the scope and timing of any final rule and for potential countermeasures from Beijing.