Speculators played a heavy role in what, sir? I am just wondering what are their problems with CURRENT commodity prices? Are we speculators creating hunger in Africa with grains at the same level as 2006-2007? Average joe cannot fuel the car with oil at 2007 level? Cannot heat their house with natural gas at crazy discounts?
Banning? I think that's just a knee-jerk reaction, with emphasis on the jerk part. Unregulated, over the counter derivatives require a good looking into, though.