The Magnet Monopoly Behind Modern Industry
Key points
Key takeaways from Maxinomics ’ “Why China Controls the Magnets” explainer (September 2026), covering MP Materials, General Motors, Proterial (formerly Hitachi Metals) and China Northern Rare Earth High-Tech.
Why magnets matter. Rare-earth magnets allow electric motors and other devices to be smaller, lighter and more efficient. The video cites uses ranging from AirPods and smartphones to electric vehicles and guided missiles.
The technology shift. General Motors and the business that became Hitachi Metals helped develop neodymium-iron-boron magnets in the 1980s. GM used the technology to reduce the size of starter motors, while the same class of magnet later spread through consumer electronics and industrial equipment.
Mountain Pass. MP Materials’ Mountain Pass mine in California is presented as one of the world’s richest rare-earth deposits. The mine supplied GM’s magnet business, but the operation later faced major environmental problems after process water containing radioactive thorium was discharged into the desert.
How China built its lead. China’s advantage was not simply geological abundance. State-backed finance, land access, processing know-how and a willingness to absorb the environmental cost helped build an integrated chain from ore separation to finished magnets.
From raw material to manufacturing. The video argues that export controls and low-cost domestic supply encouraged manufacturers outside China to transfer drawings, recipes and production know-how to Chinese factories. This moved value and expertise downstream from mining into magnet and component manufacturing.
The strategic bottleneck. Samarium is highlighted as a less common rare earth used in heat-resistant magnets for missile-control systems. The video says China has an especially strong position in samarium refining, making export restrictions a potential defence and industrial risk.
Breaking the dependency. The video describes Pentagon-backed support for US production, including a guaranteed price of $110 per kilogram and take-or-pay commitments intended to protect new capacity from another period of Chinese price competition. MP Materials is also developing domestic processing and refining capacity in Texas.
The broader lesson. Rare-earth supply chains show how a country can turn control of an industrial input into leverage over downstream manufacturing. Japan, Australia and the US are now investing in alternative mines, refining and magnet production, but rebuilding the full ecosystem will take time.
Read more: Maxinomics
