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US stocks opened lower on Tuesday amid a global bond sell-off and lingering concerns that debt-burdened Greece could run out of cash.
The Dow Jones industrial average fell 78.41 points, or 0.43 percent, to 18,026.76; the S&P 500 lost 9.59 points, or 0.46 percent to 2,095.74 and the Nasdaq Composite dropped 31.42 points, or 0.63 percent, to 4,962.15.
