Stocks rebounded in late trading to end with nice gains Wednesday. Equities had briefly turned negative after the Federal Reserve held interest rates steady but left the door open for a rate hike in December. The Nasdaq rallied 1.3%, and the S&P 500 climbed 1.2%. Meanwhile, the Dow Jones industrial average rose 1.1%. The small-cap Russell 2000 surged 2.9% Wednesday after lagging in recent sessions.