International Monetary Fund

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This handout photo provided by the International Monetary Fund (IMF) shows IMF Managing Director Christine Lagarde, left, talking with Federal Reserve Chair Janet Yellen prior to the G20 meeting at the IMF/World Bank Spring Meetings, Friday, April 11, 2014, at IMF Headquarters in Washington. (AP Photo/Stephen Jaffe, IMF)

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Treasury Secretary Jacob Lew speaks with Saudi Arabian Finance Minister Ibrahim Al-Assaf during a meeting at the World Bank Group-International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)

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Russian Finance Minister Anton Siluanov, and Russian Monetary policy chief Ksenia Yudaeva speak during the G-20 finance ministers and central bank governors group photo on the sidelines of their meeting at World Bank Group-International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)

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International Monetary Fund (IMF) Managing Director Christine Lagarde, center, accompanied by World Bank President Jim Yong Kim, left, and UN Secretary General Ban Ki-moon, meet with reporters during the World Bank Group- International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)