U.S. stocks opened lower on Tuesday as weak Chinese trade data appeared to sour Wall Street sentiment. The early slump threatens to snap a seven-day win streak for the Dow Jones Industrial Average , which lost 92 points, or 0.5%, to open at 17,041. The S&P 500 , which was on track to end four straight days of gains, fell about 11 points, or 0.6%, to 2,006. The tech-heavy Nasdaq Composite Index slipped 30 points, or 0.6%, to 4,808.
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