Different approaches to enforcement among SEC, CFTC, Fed, OCC, and FDIC may cause "a whole lot of drama."

Different approaches to enforcement among SEC, CFTC, Fed, OCC, and FDIC may cause "a whole lot of drama."

In a Senate hearing today, Janet Yellen indicated the Fed may impose new rules on banks that own and trade in physical commodities

In a Senate hearing today, Janet Yellen indicated the Fed may impose new rules on banks that own and trade in physical commodities

As regulators scrutinize investment banks' involvement in commodities, bankers say they provide vital liquidity to oil, natural gas, and other markets.

As regulators scrutinize investment banks' involvement in commodities, bankers say they provide vital liquidity to oil, natural gas, and other markets.

Federal Reserve is reviewing a decision to let banks trade commodities seen as complementary to their banking business.

Federal Reserve is reviewing a decision to let banks trade commodities seen as complementary to their banking business.