One of the most contentious parts of the massive and controversial Dodd-Frank financial market reform legislation passed by Congress in 2010 is the so-called Volcker Rule by which commercial banks with customer deposits insured by the FDIC are prohibited from proprietary trading in much of anything with the intent of profiting from such trading. The idea is to prevent banks from using customer money to "speculate" in financial instruments, commodities or other assets so that any losses suffered would not be covered by FDIC, which is to say, taxpayers. Banks would also be prohibited from owning or investing in hedge funds. The rule was named after one of its strongest proponents, Paul Volcker, a former chairman of the Federal Reserve.There...