The US-China summit produced promises on rare earths but left Beijing's export control regime untouched. For semiconductor and aerospace Supply chains, the structural risk is only deepening.

Key Highlights

  • China has agreed to address US shortages of yttrium, scandium, indium, and neodymium, but its broader export control regime remains formally intact.
  • Washington's latest summit statement drops previous language calling for the "elimination" of Chinese mineral restrictions, a tacit acknowledgment of diminished Leverage.
  • Indium, flagged for the first time, is central to photonic chips and next-generation AI data centre infrastructure.
  • China's near-total dominance over rare earth processing capacity was not addressed at the summit.
  • Coherent Corp, Lumentum Holdings, GE Aerospace, and RTX Corporation face ongoing supply exposure with no structural resolution from the summit.

The Concession Beijing Did Not Make

In the language of diplomacy, what is absent often reveals more than what is written. The White House's summary of last week's US-China leaders summit in Beijing committed China to "addressing" American concerns over critical mineral shortages. What it conspicuously omitted was any reiteration of the October 2024 Busan commitment, in which Beijing had pledged to "effectively eliminate" all current and proposed rare earth export controls.

That language is now gone. In its place: a softer formulation that signals accommodation without structural change. China's Ministry of Commerce, for its part, made no mention of rare earths at all in its own post-summit readout.

The gap is consequential. Since April 2025, Beijing has maintained a targeted export control regime on critical minerals, introduced in direct retaliation for US tariffs, that continues to restrict shipments of materials essential to American aerospace Manufacturing, semiconductor fabrication, and next-generation chip development. Export licences are flowing selectively to commercial sectors like consumer electronics and automobiles, but significantly less so to industries with dual-use military applications.

Why Indium Changes the Stakes

Among the minerals cited in the Washington fact sheet, indium stands out both for its novelty and its strategic weight. It has not appeared in prior diplomatic statements on this issue, and its inclusion signals a deepening awareness of how rare earth bottlenecks cascade into cutting-edge technology.

Indium phosphide is foundational to photonic chips: a class of semiconductors that process data using light rather than electrical current. These chips are being rapidly integrated into AI data centre architecture, where energy efficiency and processing speed are critical competitive variables. A second compound, indium tin oxide, is standard in LED display manufacturing.

Since Beijing added indium to its export control list in February 2025, global shipments have declined sharply. The US has been among the hardest hit. Coherent Corp (NYSE:COHR), which holds a 40% global Market Share in indium phosphide optical components and is actively scaling a 6-inch InP wafer line in Sherman, Texas, faces the most direct input exposure. Lumentum Holdings (Nasdaq:LITE), a competing photonics supplier with significant EML laser chip market share, faces similar Upstream pressure.

For both firms, constrained indium licensing from China translates into higher input costs, allocation bottlenecks, and potential delays to capacity expansion at a moment when hyperscaler Demand for AI data centre connectivity is running at record levels.

Structural Asymmetry Persists

The deeper problem is not the specific minerals named at the summit. It is the architecture of production that makes these negotiations structurally unequal.

China accounts for an overwhelming share of global rare earth processing, not merely Mining, which means that even nations with domestic ore deposits depend on Chinese refining capacity for usable output. This processing Monopoly was not addressed in the summit communiqué, though the White House did note US concerns over Chinese restrictions on rare earth processing technology exports. That technology is precisely what would allow alternative supply chains to emerge.

Yttrium, used in thermal barrier coatings for jet engines, and scandium, applied in semiconductor fabrication and 5G infrastructure components, have both been subject to extended licensing delays. US-bound yttrium exports fell to 17 tons in the eight months following the April 2025 controls, down from 333 tons in the same period a year earlier, a drop exceeding 90%. For GE Aerospace (NYSE:GE), which depends on yttrium-stabilised coatings to protect high-pressure turbine blades on its GE9X and GEnx engines, the constraint arrives as the company scales commercial engine output to meet record order commitments.

RTX Corporation (NYSE: RTX), whose Pratt and Whitney and Collins Aerospace divisions both source materials subject to Chinese export controls, has flagged Commodity supply disruption as a standing risk in its regulatory filings, even as it reported strong full-year 2025 results. These are not peripheral inputs. They sit at the intersection of aerospace durability and advanced manufacturing precision, sectors where supply disruption carries both commercial and national security costs.

The implicit logic of Beijing's position is coherent: control over processing technology and export licensing provides durable leverage that far outlasts any single negotiation. The one-year truce on a wider set of Chinese rare earth restrictions, due to expire in November, was not addressed in the summit statement, leaving a significant ambiguity hanging over the medium-term supply picture.

Calibrated Stability, Not Resolution

What the summit achieved is better described as managed ambiguity than structural resolution. Both governments have signalled an interest in supply chain stability, which matters in itself given the disruption that escalatory tit-for-tat would cause. Selective licensing continues to flow in less politically sensitive sectors, and the public framing from both sides suggests a shared preference for de-escalation.

But the underlying asymmetry has not shifted. American aerospace manufacturers and semiconductor firms remain dependent on a supply chain where the chokepoints are controlled by a geopolitical rival with both the capability and the demonstrated willingness to weaponise them. Diversification efforts, reshoring, allied sourcing, and alternative processing remain years away from offering viable substitution at scale.

For Capital Markets, the implications are layered. Photonic and optical semiconductor manufacturers face input risk that is politically contingent rather than market-driven. In the aerospace sector, engine and avionics producers carry ongoing exposure to yttrium and scandium licence delays that no summit communique has structurally resolved. In an environment where AI infrastructure Investment is running at historically elevated rates, any sustained constraint on the photonic chip supply chain carries a disproportionate Downstream effect on the hyperscalers and defence primes that depend on it.

The rare earth question, in other words, is no longer a commodities story. It is a structural feature of the technology investment thesis, and the summit, for all its optics, did not resolve it.

US-China Summit 2026 Fails to Crack China's Rare Earth Export Control Regime

The US-China summit produced promises on rare earths but left Beijing's export control regime untouched. For semiconductor and aerospace supply chains, the structural risk is only deepening.

Key Highlights

  • China has agreed to address US shortages of yttrium, scandium, indium, and neodymium, but its broader export control regime remains formally intact.
  • Washington's latest summit statement drops previous language calling for the "elimination" of Chinese mineral restrictions, a tacit acknowledgment of diminished leverage.
  • Indium, flagged for the first time, is central to photonic chips and next-generation AI data centre infrastructure.
  • China's near-total dominance over rare earth processing capacity was not addressed at the summit.
  • Coherent Corp, Lumentum Holdings, GE Aerospace, and RTX Corporation face ongoing supply exposure with no structural resolution from the summit.

The Concession Beijing Did Not Make

In the language of diplomacy, what is absent often reveals more than what is written. The White House's summary of last week's US-China leaders summit in Beijing committed China to "addressing" American concerns over critical mineral shortages. What it conspicuously omitted was any reiteration of the October 2024 Busan commitment, in which Beijing had pledged to "effectively eliminate" all current and proposed rare earth export controls.

That language is now gone. In its place: a softer formulation that signals accommodation without structural change. China's Ministry of Commerce, for its part, made no mention of rare earths at all in its own post-summit readout.

The gap is consequential. Since April 2025, Beijing has maintained a targeted export control regime on critical minerals, introduced in direct retaliation for US tariffs, that continues to restrict shipments of materials essential to American aerospace manufacturing, semiconductor fabrication, and next-generation chip development. Export licences are flowing selectively to commercial sectors like consumer electronics and automobiles, but significantly less so to industries with dual-use military applications.

Why Indium Changes the Stakes

Among the minerals cited in the Washington fact sheet, indium stands out both for its novelty and its strategic weight. It has not appeared in prior diplomatic statements on this issue, and its inclusion signals a deepening awareness of how rare earth bottlenecks cascade into cutting-edge technology.

Indium phosphide is foundational to photonic chips: a class of semiconductors that process data using light rather than electrical current. These chips are being rapidly integrated into AI data centre architecture, where energy efficiency and processing speed are critical competitive variables. A second compound, indium tin oxide, is standard in LED display manufacturing.

Since Beijing added indium to its export control list in February 2025, global shipments have declined sharply. The US has been among the hardest hit. Coherent Corp (NYSE:COHR), which holds a 40% global market share in indium phosphide optical components and is actively scaling a 6-inch InP wafer line in Sherman, Texas, faces the most direct input exposure. Lumentum Holdings (NASDAQ:LITE), a competing photonics supplier with significant EML laser chip market share, faces similar upstream pressure.

For both firms, constrained indium licensing from China translates into higher input costs, allocation bottlenecks, and potential delays to capacity expansion at a moment when hyperscaler demand for AI data centre connectivity is running at record levels.

Structural Asymmetry Persists

The deeper problem is not the specific minerals named at the summit. It is the architecture of production that makes these negotiations structurally unequal.

China accounts for an overwhelming share of global rare earth processing, not merely mining, which means that even nations with domestic ore deposits depend on Chinese refining capacity for usable output. This processing monopoly was not addressed in the summit communiqué, though the White House did note US concerns over Chinese restrictions on rare earth processing technology exports. That technology is precisely what would allow alternative supply chains to emerge.

Yttrium, used in thermal barrier coatings for jet engines, and scandium, applied in semiconductor fabrication and 5G infrastructure components, have both been subject to extended licensing delays. US-bound yttrium exports fell to 17 tons in the eight months following the April 2025 controls, down from 333 tons in the same period a year earlier, a drop exceeding 90%. For GE Aerospace (NYSE:GE), which depends on yttrium-stabilised coatings to protect high-pressure turbine blades on its GE9X and GEnx engines, the constraint arrives as the company scales commercial engine output to meet record order commitments.

RTX Corporation (NYSE: RTX), whose Pratt and Whitney and Collins Aerospace divisions both source materials subject to Chinese export controls, has flagged commodity supply disruption as a standing risk in its regulatory filings, even as it reported strong full-year 2025 results. These are not peripheral inputs. They sit at the intersection of aerospace durability and advanced manufacturing precision, sectors where supply disruption carries both commercial and national security costs.

The implicit logic of Beijing's position is coherent: control over processing technology and export licensing provides durable leverage that far outlasts any single negotiation. The one-year truce on a wider set of Chinese rare earth restrictions, due to expire in November, was not addressed in the summit statement, leaving a significant ambiguity hanging over the medium-term supply picture.

Calibrated Stability, Not Resolution

What the summit achieved is better described as managed ambiguity than structural resolution. Both governments have signalled an interest in supply chain stability, which matters in itself given the disruption that escalatory tit-for-tat would cause. Selective licensing continues to flow in less politically sensitive sectors, and the public framing from both sides suggests a shared preference for de-escalation.

But the underlying asymmetry has not shifted. American aerospace manufacturers and semiconductor firms remain dependent on a supply chain where the chokepoints are controlled by a geopolitical rival with both the capability and the demonstrated willingness to weaponise them. Diversification efforts, reshoring, allied sourcing, and alternative processing remain years away from offering viable substitution at scale.

For capital markets, the implications are layered. Photonic and optical semiconductor manufacturers face input risk that is politically contingent rather than market-driven. In the aerospace sector, engine and avionics producers carry ongoing exposure to yttrium and scandium licence delays that no summit communique has structurally resolved. In an environment where AI infrastructure investment is running at historically elevated rates, any sustained constraint on the photonic chip supply chain carries a disproportionate downstream effect on the hyperscalers and defence primes that depend on it.

The rare earth question, in other words, is no longer a commodities story. It is a structural feature of the technology investment thesis, and the summit, for all its optics, did not resolve it.