Stocks continued their rally in September, with all three major U.S. indices up for the month and quarter. The S&P 500 gained 2.14 percent in September and 5.89 percent for the quarter, while the Dow was up 1.96 percent during the month and 8.72 percent for the quarter. The technology-heavy Nasdaq Composite gained 2.76 percent for the month and quarter. Improving fundamentals and solid earnings growth supported these results.