NEW YORK (Reuters) - Stocks slid on Monday, giving the S&P 500 its worst day of the year, as renewed worries about the euro zone crisis caused the market to pull back from recent gains.

The Dow Jones industrial average <.DJI> unofficially closed down 129.17 points, or 0.92 percent, at 13,880.62. The Standard & Poor's 500 Index <.SPX> dropped 17.43 points, or 1.15 percent, to 1,495.74. The Nasdaq Composite Index <.IXIC> fell 47.93 points, or 1.51 percent, to 3,131.17.

(Reporting by Leah Schnurr; Editing by Nick Zieminski)