China rare earth export restrictions (2010)
China curtailed rare earth exports, exposing Japan and Western manufacturers to a supply shock. Prices spiked several-fold within months as buyers scrambled for alternatives.
Western firms paid premium prices and governments launched stockpile and recycling programs.
The episode drove supply-chain diversification and policy attention to critical minerals across the industrial world.
Shows how a single-supplier shock can reshape industrial policy. Helium's designation follows the same logic: a supply choke point forces governments to protect domestic production.
