Commodity prices have ripped in recent weeks as the market swings from expectations of a double dip to expectations of a sustained recovery. Copper, the metal often said to have a PhD in economics, has been no exception. The economically sensitive metal is up almost 40% from its summer lows. While equity markets dipped in August copper prices diverged and remained quite firm. Some have called into question whether copper is a leading indicator of the economy and stock prices, but one thing is clear from the recent action in prices – economic weakness does not appear to be a concern – for now….