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WASHINGTON, DC - MARCH 15: Federal Reserve Board Chairwoman Janet Yellen holds a news conference following a meeting of the Federal Open Market Committee March 15, 2017 in Washington, DC. Yellen announced that the Fed raised its benchmark interest rate for the third time since the 2009 global financial crisis, earlier than markets anticipated at the beginning of this year. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - MARCH 15:  Federal Reserve Board Chairwoman Janet Yellen holds a news conference following a meeting of the Federal Open Market Committee  March 15, 2017 in Washington, DC. Yellen announced that the Fed raised its benchmark interest rate for the third time since the 2009 global financial crisis, earlier than markets anticipated at the beginning of this year.  (Photo by Chip Somodevilla/Getty Images)