There are an increasing number of reports citing the potential for the recent jump in commodities prices to be more than just a short-term dynamic. Masayuki Noumi of Mizuho Bank is quoted saying, "Prices will get stuck at high levels as the balance of supply and demand is tightening." However, most such comments are focused on a few industrial commodities like copper and petroleum. The price of copper is up 70 percent from a year ago and the value of petroleum and corn have doubled. However, producing metals and oil require long-term investments that have declined whereas a surplus of corn can be just one crop away.  Indices such as the Bloomberg Commodity Index are adjusted annually to better reflect underlying changes. Bloomberg cla...