Janet Yellen smiles as President Obama announces her nomination for Federal Reserve chairwoman on Oct. 9. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

Outgoing Federal Reserve Chairman Ben Bernanke spoke about the Federal Reserve's first and next century on Thursday at the Brookings Institution in Washington. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP