Federal Reserve Said to Probe Banks Over Forex Fixing

``The Fed, which supervises U.S. bank holding companies, is among authorities from London to Washington probing whether traders shared information that may have let them manipulate prices in the $5.3 trillion-a-day foreign-exchange market to maximize their profits, said a person with direct knowledge of the matter, asking not to be named because it's confidential. The central bank's involvement in the probe hasn't been previously reported.''