The market for copper experienced a global oversupply in the last 4 years with a sharp decline in prices. The Sierra Gorda mine in Chile and the Constancia mine in Peru will add more supply of copper. Prices of iron ore dropped 50% in 2014, and copper 14%. The CEO of Glencore PLC, Ivan Glasenberg, says the problem is a huge misallocation of capital, as companies in the mining business continued to invest heavily with supplies outstripping demand.