Foreign Banks Decode FCC Optical Module Ban Rumors: Winners and Losers
0xBroomberg
Morgan Stanley, Citi, and JPMorgan each weighed in on rumors that the FCC may restrict Chinese optical modules — Coherent and Lumentum emerge as consensus beneficiaries, but real supply-chain constraints and uncertain policy timing leave the final impact far from settled.
If the ban lands, who gets the orders first?
All three banks converge on one call: Coherent and Lumentum are the most direct beneficiaries. This means → the market is betting on who can immediately absorb share redirected from Chinese suppliers.
JPMorgan put a number on it: Zhongji InnoLight and Eoptolink's combined U.S. revenue implies a potential ≈$10 billion addressable shift.
Fabrinet was flagged by both Morgan Stanley and JPMorgan as a second-tier winner; Ciena and Corning were rated limited-impact by both houses.
Why is the ban so hard to enforce?
Citi laid out the core constraint: seven of the world's top ten optical-module makers are Chinese, supplying over 50% of high-speed modules to U.S. hyperscalers. In plain terms = more than half the critical parts come from China — a clean cut shuts down the buyer first.
There is a hidden dependency layer: U.S. vendors themselves source indium phosphide substrates — the key material for making lasers — from Chinese firms such as AXTI. This means → even banning Chinese modules does not automatically clear the upstream bottleneck.
Citi's base case: the policy will most likely include partial exemptions, not a blanket block.
Among Chinese suppliers, who can absorb the hit?
Citi ranked exposure: Tianfu Communication (indirect) ＜ Daweilaser (laser + module) ＜ Eoptolink (module).
Eoptolink derives roughly 88% of revenue from its Thailand base, facing significantly lower tariff and regulatory risk. Daweilaser plans to bring 35 million units of 800G/1.6T capacity online by 2027 — two-thirds in Thailand, one-third in Taiwan. This reflects a pattern: leading Chinese players have long been hedging policy risk through offshore factories.
The key variable remains unanswered: will the rules extend to Chinese-owned capacity in third countries? If so, the Thailand buffer shrinks sharply.
Is this another cry of wolf?
JPMorgan noted the rumor is not baseless: in June 2026 the U.S. Department of Defense added optical-module makers to an updated list, and capacity has been steadily migrating to Malaysia, Vietnam, and Thailand.
Yet JPMorgan also cautioned: similar proposals have repeatedly fizzled historically — bills shelved or heavily watered down between headline and enactment.
In plain terms = the rumor has a real policy signal behind it, but it is far from a done deal. The final version and severity of the policy is the verification node that will decide whether the optical-communications sector re-rating can hold.
Content is for reference only, not financial advice.