U.S. stocks closed sharply lower on Wednesday, after Wall Street was hit with a 3.5-hour outage at the New York Stock Exchange. Stock prices were already trading lower before the trading suspension as investors grappled with a precipitous selloff in Chinese shares and lingering nervousness over Greece. The S&P 500 lost 34.65 points, or 1.7%, to close at 2,046.69, its lowest closing level since March. The Dow Jones Industrial Average dropped 261.49 points, or 1.5%, to 17,515.42, its lowest closing level since February. The Nasdaq Composite ended the day down 87.70 points, or 1.8% at 4,909.76.
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