Fed Reserve Chair Janet Yellen And IMF Head Christine Lagarde Address Finance Conference [Getty Images]

WASHINGTON, DC - MAY 06: Federal Reserve Board Chairwoman Janet Yellen (L) and International Monetary Fund Managing Director Christine Lagarde shake hands while speaking about global finance during a conference May 6, 2015 in Washington, DC. The Institute for New Economic Thinking held its Finance & Society conference at IMF headquarters. (Photo by Mark Wilson/Getty Images)

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