US stocks surged Thursday for the second day in a row following Wednesday's Federal Reserve meeting as investors brushed aside concerns over another drop in oil prices.At the closing bell, the Dow Jones Industrial Average stood at 17,776.48, up 419.61 points (2.42 percent). The broad-based S&P 500 shot up 48.20 (2.39 percent) to 2,061.09, while the tech-rich Nasdaq Composite Index gained 104.08 (2.24 percent) to 4,748.40.