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The Dow Jones Industrial Average fell 46.99 points, or 0.19 percent, at the open to 24,620.79. The S&P 500 opened lower by 3.03 points, or 0.11 percent, at 2,720.98. The Nasdaq Composite dropped 6.87 points, or 0.09 percent, to 7,455.58 at the opening bell.