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NEW YORK, Feb 17 (Reuters) - U.S. stocks opened flat on Tuesday, the first trading session after the S&P 500 closed at a record high, although investors continued to watch the uncertainty over a Greek debt deal and a fragile Ukraine truce.
The Dow Jones industrial average fell 26.69 points, or 0.15 percent, to 17,992.66, the S&P 500 lost 2.5 points, or 0.12 percent, to 2,094.49 and the Nasdaq Composite dropped 4.49 points, or 0.09 percent, to 4,889.35. (Reporting by Ryan Vlastelica; Editing by Nick Zieminski)