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NEW YORK, NY - JUNE 20: A pedestrian passes the New York Stock Exchange on June 20, 2013 in New York City. In Wall Street's worst day of the year, the Dow Jones industrial average plunged more than 300 points, or two percent. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - JUNE 20:  A pedestrian passes the New York Stock Exchange on June 20, 2013 in New York City. In Wall Street's worst day of the year, the Dow Jones industrial average plunged more than 300 points, or two percent.  (Photo by Spencer Platt/Getty Images)