Copper's the only commodity in a net short position. With news China is adding to strategic stockpiles, hedge funds are scrambling to find 375m pounds they don't have.
In 2010, rare earth and specialty metals market froth had speculators throwing money at a sector they didn't understand, and opportunistic resource company managers stepped up to take their money.
While Walter Energy shuts down two coal mines, leaving hundreds unemployed, HD Mining International plans to bring up to 480 Chinese workers to British Columbia.
At the moment about 90% of the world’s rare earths —used in a variety of industries including green technology, defence systems and consumer electronics— come from China.