In this file photo dated Oct. 10, 2012, Janet Yellen, Vice Chair of the US Federal Reserve System, attends a seminar on ’Sovereign Risk, Capital
In this file photo dated Oct. 10, 2012, Janet Yellen, Vice Chair of the US Federal Reserve System, attends a seminar on 'Sovereign Risk, Capital Markets, and Financial Stability: The Interconnections' during the International Monetary Fund (IMF) and the World Bank Annual Meetings in Tokyo, Japan. (FRANCK ROBICHON/EPA) (FRANCK ROBICHON/EPA)