Janet Yellen prepares to step into Bernanke's shoes
31 January 2014 Last updated at 22:48 GMT
As Ben Bernanke spends his last day as chairman of America's Central Bank, his successor Janet Yellen is preparing to take over.
She arrives in the job at a time of concern about the global consequences of the Fed's changing policies.
She is the first woman to head the institution and as Linda Yueh explains, she will face a delicate balancing act.