Stocks extended losses on Friday, with the Dow industrials and the S&P 500 falling into negative territory after Fitch threatened to cut the ratings of several euro zone nations, reigniting worries about the region.

The Dow Jones industrial average <.DJI> dropped 37.39 points, or 0.32 percent, to 11,831.42. The S&P 500 Index <.INX> edged up 0.43 point, or 0.04 percent, to 1,216.18. The Nasdaq Composite <.IXIC> gained 9.04 points, or 0.36 percent, to 2,550.05.

Fitch warned it may downgrade the rating of six EU nations in the absence of a comprehensive solution to the region's debt crisis.

(Reporting by Rodrigo Campos; Editing by Jeff Benkoe)