(Reuters) The Federal Reserve is “reviewing” a landmark 2003 decision that first allowed regulated banks to trade in physical commodity markets, it said on Friday, a move that may send new shockwaves through Wall Street.

The one-sentence statement suggests the Fed is taking a much deeper, wide-ranging look at how banks operate in commodity markets than previously believed, amid intensifying scrutiny of everything from electricity trading to metals warehouses.

While the Fed has been debating for years whether to allow banks including Morgan Stanley and JPMorgan to continue owning assets like oil storage tanks or power plants, Friday’s surprise statement suggests it is also reconsidering whether all bank holding firms should be able to trade raw materials such as gasoline tankers and coffee beans.

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