Wall St ends mixed

U.S. stocks closed mixed after Federal Reserve said it will maintain bond-buying policy in ongoing effort to support the U.S. economy.
Dow Jones Industrial Average slipped 21.05 points to close at 15,499.54. 
S&P 500 erased 0.23 points to end at 1,685.72. And Nasdaq eked out a gain of 9.90 points to end at 3,626.37.
Among key S&P sectors, consumer discretionary and energy stocks led the gainers, while telecom and utilities shares slid.