File photo of U.S. Federal Reserve Chairman Bernanke preparing to speak at the Economic Club in Washington

 
File photo of U.S. Federal Reserve Chairman Bernanke preparing to speak at the Economic Club in Washington
File photo of U.S. Federal Reserve Chairman Ben Bernanke as he prepares to speak at the December luncheon meeting of the Economic Club of Washington on December 7, 2009. REUTERS/Jason Reed/Files