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NEW YORK, April 21 (Reuters) - U.S. stocks advanced modestly on Monday in subdued trading as investors showed hesitation after a strong rally last week and ahead of a slew of key earnings releases this week.
The Dow Jones industrial average rose 40.71 points or 0.25 percent, to end unofficially at 16,449.25. The S&P 500 gained 7.04 points or 0.38 percent, to close unofficially at 1,871.89.The Nasdaq Composite added 26.03 points or 0.64 percent, to finish unofficially at 4,121.546. (Reporting by Chuck Mikolajczak; Editing by Jan Psachal)