By Chuck Mikolajczak
NEW YORK (Reuters) - U.S. stocks closed out a fourth straight month of gains as the S&P 500 edged up to another record high on Friday after mixed economic data gave investors little incentive to buy equities.
The Dow Jones industrial average <.DJI> rose 18.43 points or 0.11 percent, to end unofficially at 16,717.17. The S&P 500 <.SPX> gained 3.54 points or 0.18 percent, to finish unofficially at 1,923.57. The Nasdaq Composite <.IXIC> dropped 5.33 points or 0.13 percent, to close unofficially at 4,242.62.
For the week, the Dow rose 0.7 percent, the S&P 500 gained 1.2 percent and the Nasdaq added 1.4 percent.
For the month of May, the Dow gained 0.8 percent, the S&P 500 rose 2.1 percent and the Nasdaq climbed 3.1 percent.
(Reporting by Angela Moon; Editing by Jan Paschal)