Huh. I'd have thought that capacity would rise with ore supply. It is "free money". Why leave it in the ground?
Sounds as if there is a point at which digging and refining is more expensive than buyers are willing to pay, so when demand goes up it takes time to expand supply.
Sounds as if there is a point at which digging and refining is more expensive than buyers are willing to pay, so when demand goes up it takes time to expand supply.