Fed seen limiting bank's commodities operations.

The Federal Reserve is expected to soon publish guidelines that would restrict banks' involvement in physical-commodities businesses. The new rules, which would be designed to limit banks' risky activities, could accelerate the withdrawal of JPMorgan (JPM)Morgan Stanley (MS) and Goldman Sachs (GS) from sectors such as metals warehousing and power generation, where GS and JPM respectively have been accused of price manipulation.