Janet Yellen Speech Live Update: Federal Reserve Keeps Interest Rates Unchanged In FOMC Statement

UPDATE 3:30 p.m. EDT The U.S. Federal Reserve left interest rates unchanged Thursday, but left open the possibility of tightening monetary policy later this year. The Dow initially soared nearly 200 points during Janet Yellen's speech after trading flat following the central bank's statement, only to reverse and trade lower after the fed chair left the door open to hiking rate as early as October. UPDATE 3:17 p.m. EDT