Critical‑materials Retaliation Risk
Analysts say China could respond to U.S. moves around Hormuz or tariffs by restricting exports of critical materials such as rare earths, which would ripple through manufacturing supply chains even when the direct vendor is outside China. U.S. media and industry reporting — and a recent YouTube feature on startups trying to break China's mineral chokehold — underline that processing and refining concentration, not just raw extraction, drives this vulnerability. ( )
The risk is not just that China mines rare earths. It is that China does much of the chemical processing and magnet-making that turns rock into usable parts. (iea.org) That vulnerability moved back into focus on April 13, 2026, after India Today reported that President Donald Trump had threatened a U.S. naval blockade in the Strait of Hormuz following collapsed ceasefire talks with Iran in Pakistan. The report said analysts saw room for Chinese retaliation beyond oil, including critical materials. (indiatoday.in) China has already shown how that tool works. On April 4, 2025, Beijing imposed export controls on seven medium and heavy rare earth items, including dysprosium, terbium, yttrium and scandium, with licenses required immediately. (news.cgtn.com) Those elements are not obscure lab metals. They are used in permanent magnets and high-performance components that go into electric vehicles, wind turbines, semiconductors, smartphones and military systems. (energy.gov) The choke point sits in refining. The International Energy Agency said in late 2025 that China was the leading refiner for 19 of 20 strategic minerals, with an average market share of 70%. (iea.org) That means a factory can feel a China shock even when its direct supplier is in Japan, Europe or the United States. If the oxide, metal, alloy or magnet upstream was processed in China, a license delay or export curb can still stop production lines. (iea.org) United States government data shows how incomplete the domestic chain still is. The U.S. Geological Survey said the United States mined and processed rare earths in 2025, producing an estimated 51,000 metric tons of rare-earth-oxide concentrate, but imports of rare-earth compounds and metals still jumped 169% that year. (usgs.gov) That is why new projects are chasing the middle of the chain, not just new mines. Bloomberg’s April 2026 video report followed Phoenix Tailings in New Hampshire, where chief executive Nick Myers said his company is trying to build processing capacity outside China. (youtube.com) Other companies are trying to move downstream into magnets. USA Rare Earth said this month that its Stillwater, Oklahoma, line had begun commercial production of sintered neodymium-iron-boron magnets, and Chemical and Engineering News reported a new partnership between USA Rare Earth and France’s Carester to expand processing and magnet capacity in the United States and France. (marketwatch.com) (cen.acs.org) Some analysts argue Beijing’s leverage is real but not unlimited, because high prices and repeated curbs push buyers to build alternatives. The Diplomat wrote last week that China’s rare-earth advantage is substantial, but not a permanent strategic trump card. (thediplomat.com) For manufacturers, the immediate question is simpler than the geopolitics. It is whether a part that looks sourced from an ally still depends on a Chinese refinery several steps earlier in the chain. (iea.org)
