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NEW YORK, Oct 9 (Reuters) - U.S. stocks opened modestly lower on Thursday, as concerns about global growth spurred investors to take profit following a massive advance in the previous session.
The Dow Jones industrial average fell 50.54 points, or 0.3 percent, to 16,943.68, the S&P 500 lost 4.2 points, or 0.21 percent, to 1,964.69 and the Nasdaq Composite dropped 9.48 points, or 0.21 percent, to 4,459.12. (Reporting by Chuck Mikolajczak; Editing by Bernadette Baum)