A slide in oil prices and mixed news on jobs in the U.S. sent stocks lower on Friday. Investors were discouraged by weak U.S. wage growth in December, despite another strong increase in hiring. Friday's loss followed two days of big gains for U.S. stocks.

On Friday:

The Dow Jones industrial average slid 170.50 points, or 1 percent, to 17,737.37.

The Standard & Poor's 500 index shed 17.33 points, or 0.8 percent, to 2,044.81.

The Nasdaq composite lost 32.12 points, or 0.7 percent, to 4,704.07.

For the week:

The Dow is down 95.62 points, or 0.5 percent.

The S&P 500 is down 13.39 points, or 0.7 percent.

The Nasdaq composite is down 22.75 points, or 0.5 percent.

For the year:

The Dow is down 85.70 points, or 0.5 percent.

The S&P 500 index is down 14.09 points, or 0.7 percent.

The Nasdaq is down 31.99 points, or 0.7 percent.