U.S. stocks finish lower after Fed official remarks as investors await debt-ceiling vote

U.S. stocks finished lower Wednesday, with the S&P 500 closing out May with a small gain, as investors weighed remarks from Federal Reserve officials on monetary policy while awaiting a debt-ceiling vote by Congress.

The Dow Jones Industrial Average DJIA closed 0.4% lower on Wednesday, while the S&P 500 SPX fell 0.6% and the Nasdaq Composite COMP shed 0.6%, according to preliminary data from FactSet. 

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