Strike at Freeport's giant Peru mine takes offline world's three biggest mines, but worries about demand drops copper after huge jump in warehouse stocks.
The head of China's second-largest copper refiner is sounding a bearish note on the red metal, even as the country is targetting higher economic growth.
You've probably given little thought to a perennially overlooked metal called cobalt, even though chances are you’re reading this very article on a device powered by a battery containing a significant proportion of the metal.
