Fed's Ben S. Bernanke, Janet Yellen and Elizabeth Duke

Fed's Ben S. Bernanke, Janet Yellen and Elizabeth Duke

Andrew Harrer/Bloomberg

Ben S. Bernanke, chairman of the U.S. Federal Reserve, from left, Janet Yellen, vice chairman of the Federal Reserve, and Elizabeth Duke, governor of the Federal Reserve, are seen in this 2011 photo. Duke announced yesterday she is leaving the Federal Reserve Board in August.