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April 27 (Reuters) - U.S. stocks opened lower on Wednesday as weak results from Apple raised investor concerns about the quality of corporate earnings ahead of a policy decision by the Federal Reserve.
The Dow Jones industrial average was down 50.95 points, or 0.28 percent, at 17,939.37, the S&P 500 was down 4.52 points, or 0.22 percent, at 2,087.18 and the Nasdaq composite was down 32.22 points, or 0.66 percent, at 4,856.06. (Reporting by Yashaswini Swamynathan in Bengaluru; Editing by Don Sebastian)