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March 13 (Reuters) - U.S. stocks opened modestly lower on Friday as crude oil prices continued to fall, putting the S&P 500 on track for its third straight weekly decline.
The Dow Jones industrial average fell 36.64 points, or 0.2 percent, to 17,858.58, the S&P 500 lost 3.36 points, or 0.16 percent, to 2,062.59 and the Nasdaq Composite dropped 6.17 points, or 0.13 percent, to 4,887.12.
Reporting by Sinead Carew; Editing by Bernadette Baum