I am fortunate to have Ken Berg, a commodities regulatory guru, just down the hall from me, so I’ve never had to learn that stuff too well.  But, here, as you will see, there can be considerable overlap between the securities and the commodities regulatory regimes.  The decision that Ken writes about arose in the context of a commodities purchase, but it may have a significant impact on securities arbitrations.  It makes good reading, therefore, even for…