U.S. stocks opened lower Wednesday, weighed down by Apple Inc. , after the world's largest company by market capitalization saw its quarterly revenue decline for the first time in 13 years. The S&P 500 shed 6 points, or 0.3%, to 2,086. The Dow Jones Industrial Average slid 51 points, or 0.3%, to 17,939. The Nasdaq Composite fell 32 points, or 0.6%, to 4,857.
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