U.S. stocks opened lower on Friday after data showed the U.S. economy grew less than expected in the fourth quarter, while weak earnings from Ford and Procter & Gamble and euro zone debt worries also weighed on the market.

The Dow Jones industrial average <.DJI> lost 23.54 points, or 0.18 percent, at 12,711.09. The Standard & Poor's 500 Index <.SPX> fell 2.99 points, or 0.23 percent, at 1,315.44. The Nasdaq Composite Index <.IXIC> dropped 6.79 points, or 0.24 percent, at 2,798.49.

(Reporting By Chuck Mikolajczak; editing by Jeffrey Benkoe)