Is there any doubt at all the rise in commodity stable prices is directly the result of banking speculator activities? Corner a market in some commodity that can be stored, store it, drive up the price, and bet on the rise in price in some form of derivative? At some peak, release the store at its highest and leave the market after collecting as much cash as possible.
There was just a report of this kind of activity over coca by some Mayfair Street financial firm on Aljazeera about ten minutes ago. There seems to me to be no mystery at all about this.
CG