Dow Jones Industrial Average Drops As Wall Street Weighs Fed Rate Hike Decision

U.S. stocks closed lower Thursday after witnessing major volatile swings in afternoon trading as Wall Street digested comments from Fed Chairwoman Janet Yellen. After trading flat following the central bank's initial statement that left interest rates unchanged, the Dow rose nearly 200 points during Yellen's speech, only to reverse and trade lower after she left the door open to hiking rate as early as October.