Borders make new slots in the chain
Borders do not merely split the chain by region. Export controls, tariffs and sovereignty demands create slots in the chain that were never there. Hua Hong rose +412.1% in 2025 and Korea's Soulbrain +192.8%, yet the AI demand curve was not what drove those gains. A node made this way (a company this wiki tracks) runs apart from the global demand cycle, on the clock of policy. It rises when a rule takes effect and re-rates when localization is complete.
Export controls create slots that did not exist
Once the US blocked advanced chips and tools from China and ASML's EUV was barred, China was forced to grow a self-sufficient chain (see China's parallel ecosystem): Cambricon in design (+420% in 2024, on China's government approval list) and Hygon (built at SMIC, +106.8% in 2025), SMIC (+169.9% in 2024) and Hua Hong (+412.1% in 2025) in foundry, Naura (+70.6% in 2025) and AMEC (800+ tools at SMIC, +93.5% in 2025) in equipment.
These slots are nodes that would not exist under free trade. Cut off from the world cycle, they surged separately on a localization premium. Hua Hong's +412% in 2025 came less from AI demand than from its standing as domestic replacement capacity, once SMIC and Hua Hong became irreplaceable at home. A foundry that competes on the world market keeps a different footing. Taiwan's UMC managed only +28.8% in 2025. A slot made by policy answered to the regulatory calendar more than to world demand.
The same force carved a slot into Korea's materials
The same grammar worked from the other side. Japan's 2019 export curbs on materials to Korea created localization nodes in Korean semiconductor materials: Dongjin Semichem, the only domestic EUV photoresist (+160.1% in 2025); Soulbrain, at 70-100% of the domestic etchant share (+192.8% in 2025); ENF Technology, which localized HF (+204.6% in 2025); and Foosung, the only domestic maker of C4F6 and WF6 (+67.4% in 2025, +93.7% in 2026).
Watch the timing. These were all negative in 2024 (Soulbrain -37.6%, Dongjin -42.8%, ENF -16.1%) and flipped to triple digits in 2025. The reversal reflected the policy rhythm of localization turning into earnings more than any smooth flow of world materials demand. Only Foosung carried a year further at +93.7% in 2026, in step with fluorine-gas localization completing that year. The drive to hold a bottleneck inside the border is what created these nodes.
Sovereignty puts a nationality on the satellite
Sovereignty demands make slots in orbit too. Europe wanted its own communications, not dependence on US or Chinese constellations, and that demand built Eutelsat's low-orbit OneWeb (LEO revenue €187M, +84%) and a rising government share (Eutelsat +32.1% in 2025). SES rose +141.5% in 2025 on government and aviation demand, and Airbus, the manufacturing axis, builds those satellites. The same slot sits across the Atlantic: Viasat, with 16-17% of revenue from the US government, jumped +304.9% in 2025 on defense and aviation demand. As seen in sovereignty as a re-rating axis, what lifted these nodes appears to be nationality as a policy variable more than the market.
Tariffs pull the chain back home
The logic of tariffs and reshoring is to bring the same process back onshore. Amkor Technology (+118% in 2026), with its $7B Arizona campus to package Apple silicon and NVIDIA parts onshore, and HD Hyundai Electric (+300.5% in 2024), 40% North American revenue with a $6.73B transformer backlog, are the examples. GlobalFoundries, a mature and specialty-node maker taking US automotive and industrial volume, joined the move at +147% in 2026. What tariffs make is a new location more than new demand, a slot that rebuilds the same process inside the border. Here too the deciding variable is policy: Amkor's re-rating tracked the Arizona groundbreaking and tax support, and moved independently of the AI demand curve.
Verdict
Part three, the geography arc, closes. The chain splits along borders, and borders go further and make new slots. Export controls carved localization nodes into China and Korea, sovereignty carved a satellite node into Europe, and tariffs carved a reshoring node into the US. And a node made by a border runs not on market conditions but on the clock of policy. Korea's materials, flipping from negative in 2024 to triple digits in 2025, are the case in point. Among the many clocks, these nodes are wound by a separate spring called policy.
With this, both axes of the AI chain's grammar are in view: time (the cycle) and space (geography). One question remains. Does the same grammar hold on frontiers beyond AI? If infrastructure re-rates before application on every frontier, this wiki's grammar reaches past AI itself.