Copper has many of the same supply problems as silver, just a few years behind. Silver has been in supply deficit for 5 years, with demand exceeding supply by 100-200 million oz per year. Copper is starting to show the same signs. Globally, all of the mines cannot meet global demand. And it takes many years to bring on new mines. New mines tend to be smaller, lower quality ore, more remote, more expensive. The best deposits have been mined for 100+ years and are being depleted.(Wall Street Mav)