Chinese Telecom Suppliers Slump as US Considers New Import Curbs

Shares in major Chinese telecommunications equipment suppliers tumbled on Monday as investors reacted to two new U.S. legislative proposals aimed at curbing the use of Chinese technology in American networks and data centers. The moves signal escalating regulatory risk for firms central to the AI supply chain, with optical transceiver manufacturers facing the most significant market pressure.

Proposed Legislation Sparks Sell-Off

Two separate bills are reportedly under consideration by U.S. lawmakers, increasing regulatory headwinds for Chinese tech exporters. The primary concern for investors stems from a bill introduced on September 25 that would specifically bar Chinese-made data center technology, such as optical transceivers, from sensitive U.S. government systems. The proposal would give federal agencies five years to comply.

A second, bipartisan bill proposed on September 23 aims to reform the process for placing companies on the Federal Communications Commission's (FCC) "Covered List" of restricted entities. While it would require more inter-agency input and give Congress review power, it underscores the continued focus on securing U.S. telecom supply chains.

Market Impact and Company Exposure

The market has begun pricing in these new risks, with the most exposed companies seeing significant declines. The impact varies based on each firm's reliance on the U.S. market and its current regulatory status.

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• Zhongji Innolight (3308.HK) and Eoptolink (300502.SZ), leading suppliers of transceivers for U.S. AI data centers, are considered the most exposed. On Monday, Zhongji Innolight’s stock fell 10.5%, while Eoptolink dropped 7.5%.
• ZTE Corp (0763.HK), which is already on the FCC's Covered List, saw a more moderate decline of 2.05%. The market appears to consider much of the regulatory risk already priced into its stock, which is down 34.5% over the past year.
• Coherent (COHR), a U.S.-based competitor, is seen as a potential beneficiary. Its stock rose 1.8% in the previous session on the prospect of reduced competition from Chinese rivals.

Context and Mitigating Factors

Despite the proposed restrictions, several factors could soften the blow. A report from the Foundation for American Innovation noted that U.S. suppliers like Coherent and Lumentum currently lack the scale to replace their Chinese counterparts quickly, potentially creating supply chain disruptions.

Tech industry lobbying groups are also pushing back. The Information Technology Industry Council (ITI) has reportedly asked the FCC not to blacklist optical transceivers, warning that such a move could hinder the buildout of critical AI data centers in the U.S. Furthermore, the procedural changes in the second bill could make future additions to the FCC's restricted list slower and more predictable for the industry.