Wall Street sinks after Fed fails to impress

Wall Street dropped sharply on Wednesday after the U.S. Federal Reserve frustrated stock investors hoping for a strong sign it might scale back future interest rate hikes because of recent financial and economic turmoil. In a widely expected decision, the Fed kept interest rates unchanged and it said it was "closely monitoring" global economic and financial developments, but it maintained an otherwise upbeat view of the U.S. economy. With plummeting oil prices and fears of slower economic growth