Janet Yellen during her confirmation hearing earlier this month. She's expected to win Senate approval to take over as head of the Federal Reserve. Brendan Smialowski /AFP/Getty Images hide caption

itoggle caption Brendan Smialowski /AFP/Getty Images

President Obama's nominee to lead the Federal Reserve, Janet Yellen, stands in the State Dining Room of the White House on Wednesday. If Yellen's nomination is confirmed by the Senate, she'll be the first woman to head the Federal Reserve System. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Federal Reserve Chairman Ben Bernanke talks to educators Aug. 7 in Washington, D.C. At their most recent meeting, many Fed members backed action to boost the economy. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP