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The Dow Jones Industrial Average rose 55.15 points, or 0.23 percent, at the open to 24,317.66. The S&P 500 opened higher by 5.94 points, or 0.22 percent, at 2,669.36. The Nasdaq Composite gained 32.20 points, or 0.45 percent, to 7,241.82 at the opening bell.