After recovery of the past few weeks, copper prices sunk once again for the prior week, to mark three weeks falling in the last four months. This fall occurs with difference 77 $/mt, the reason for this drop is the mixture of data failures of China where he holds increased reserves available. To point out that China is the largest consumer of copper and hold the lever of change of the world. An increase would be held by the building development of China. Following the listing of Shanghai …