Another reason to expect higher prices for copper
Supply / Demand arguments aside, I heard a different prospective today that will drive copper prices up as well. As ore grades around the world worsen & only lower grade deposits are available, miners will require higher prices to mine it as you have to mine more material and this drives up cost. Miners require a minimum to continue so the price will have to rise to reflect the higher cost per ton to mine and deliver returns that miners will require.