The role played by excessive speculation is a curious one. It seems that it only occurs when prices are rising, never when they are falling.As Gary Blumenthal noted in yesterday's WPI report, representatives of the EU Commission and the EU Parliament have reached an agreement to set speculative position limits on derivative trading in commodities as well as limits on computerized flash trading. Formal approval by EU member governments is expected in the months ahead. Back in the U.S., the CFTC is currently soliciting public comments on its revised proposal for speculative position limits in derivatives for 28 agricultural, metals and energy commodities which, according to the CFTC, are mandated by the Dodd-Frank legislation. The limits woul...