Janet Yellen Janet Yellen

Federal Reserve policymakers left rates unchanged, saying they were worried about job growth and did not want higher rates to affect hiring. Karen Bleier/AFP/Getty Images hide caption

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Karen Bleier/AFP/Getty Images

An employee prepares to install the hood on a vehicle at a General Motors plant in Arlington, Texas. Federal Reserve policymakers say recent indicators point to a strengthening labor market. Bloomberg via Getty Images hide caption

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Bloomberg via Getty Images

Federal Reserve Board Chair Janet Yellen listens to questions during a House Financial Services Committee hearing on Capitol Hill on Wednesday. Delivering the Federal Reserve's semiannual Monetary Policy Report to the House Committee, Yellen aired caution about global economic conditions. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

Federal Reserve Chair Janet Yellen testifies before the Senate Banking Committee in July. This week, Yellen and other policymakers are weighing the Fed's first rate increase in nine years. Susan Walsh/AP hide caption

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Susan Walsh/AP

Federal Reserve Board Chair Janet Yellen gestures as she testifies during a Senate Banking, Housing and Urban Affairs Committee hearing while delivering the Federal Reserves semiannual Monetary Policy Report on Capitol Hill Thursday. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

The Senate has approved Janet Yellen as the next head of the Federal Reserve. At a ceremony commemorating the Fed's centennial last month, Yellen sat with (from left-to-right) former chairmen Paul Volker and Alan Greenspan, and current Fed leader Ben Bernanke. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

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

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Brendan Smialowski /AFP/Getty Images

Janet Yellen, President Obama's nominee to become the next chairman of the Federal Reserve Board, is sworn in Thursday on Capitol Hill for her confirmation hearing. Jacquelyn Martin/AP hide caption

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Jacquelyn Martin/AP

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

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Charles Dharapak/AP

President Obama and House Speaker John Boehner sit together at a Capitol event in February dedicating a statue of civil rights icon Rosa Parks. J. Scott Applewhite/AP hide caption

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J. Scott Applewhite/AP