Gary Gensler, chairman of the U.S. Commodities Futures Trading Commission, is an ex-banker whose job it is to rein in other bankers. Part of an original group of financial reformers including Sheila Bair and Elizabeth Warren, he’s still fighting the good fight in Washington, most recently nabbing Barclays Bank for interest rate rigging in the LIBOR scandal, an ongoing investigation involving as many as 20 major banks.

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