(FILES) In this file photo taken on November 14, 2017 US Federal Reserve chief Janet Yellen speaks as she attends a conference titled "Communications Challenges for Policy Effectiveness" organised by the European Central Bank (ECB) at the ECB headquarters in Frankfurt am Main, western Germany. - US President-elect Joe Biden on November 30, 2020 selected former Federal Reserve chair Janet Yellen as his choice for Treasury secretary. "Janet Yellen is nominated to serve as Secretary of the Treasury. If confirmed, she will be the first woman to lead the Treasury Department in its 231-year history," Biden's transition team said in a statement. (Photo by Daniel ROLAND / AFP)
