China tightens indium export checks as AI demand increases

China is increasing scrutiny on indium exports, with some buyers reporting customs approvals stretching from same day to several days and requests for end-user disclosures. Indium is critical for displays, solder, and indium phosphide used in AI data-center chips, while China supplies nearly 70% of global output. Although no shipments have been blocked yet, the tighter due diligence raises the risk of future export controls and supply disruption.

Analysis

The near-term read is not about indium itself but about China signaling a willingness to weaponize a critical AI input that sits one layer upstream of the headline semiconductor supply chain. That matters because the first-order pain would likely hit component makers and optical interconnect suppliers before it shows up in GPU unit forecasts; buyers respond to regulatory friction by building buffer inventory, which temporarily supports volumes but eventually squeezes gross margins and elongates working capital cycles.

COHR is the cleaner second-order exposure because its AI optical portfolio is more directly tied to indium phosphide availability and China scrutiny can hit both sourcing and customer delivery confidence. NVDA is less exposed operationally, but the market could still assign a small geopolitical discount if this becomes a broader pattern of pre-emptive controls around AI infrastructure inputs; that discount is usually modest at first and then re-rates sharply only if multiple chokepoints are bundled together.

The key catalyst window is weeks to months, not days: customs delay alone is enough to create a soft embargo effect before any formal ban. The contrarian point is that China may be using end-user checks as signaling rather than moving straight to restrictions, which means the market may be overpricing an immediate supply shock while underpricing the strategic value of stockpiling and supplier diversification for non-China buyers. If U.S. agencies or major hyperscalers begin front-loading purchases, that can actually pull forward demand and create a temporary favorable tape for COHR while worsening later scarcity.

The tail risk is a formal export-control expansion that spreads from indium into adjacent inputs used in photonics and advanced packaging, at which point AI infrastructure spend gets hit through lead times rather than demand destruction. That would be a slow-burn negative for the optical supply chain over 1-2 quarters, but a faster negative for sentiment because investors will price in repeated bottlenecks across the AI stack.

Key Decisions for Investors

• Short COHR on strength for a 1-3 month horizon; use a tight stop if there is no formal policy action and approvals normalize, since the current setup is more about creeping friction than an immediate ban.
• Use NVDA as a relative long versus COHR via a pair trade: long NVDA / short COHR to express that the market is likely to over-penalize the most visible beneficiary while NVDA's direct earnings sensitivity remains limited.
• Buy 2-4 month COHR put spreads to capture a possible rerating if customs scrutiny broadens into actual end-user reporting requirements; risk/reward is attractive because implied volatility should stay contained until concrete policy escalation.
• Add a modest long in non-China diversified optical/component suppliers only after confirmation of supply-chain rerouting; the trade works best if buyers start pre-loading inventory, but should be treated as a tactical hedge rather than a core position.
• If additional export-control headlines emerge, reduce high-beta AI infrastructure exposure for 1-2 weeks; these stories often trigger de-rating across the group before fundamentals can be re-underwritten.