Stocks briefly added to gains on Thursday following a report that showed factory activity in the U.S. Mid-Atlantic region accelerated in March.

* The Dow Jones industrial average <.DJI> was up 19.27 points, or 0.18 percent, at 10,752.94. The Standard & Poor's 500 Index <.SPX> was down 0.19 points, or 0.02 percent, at 1,166.02. The Nasdaq Composite Index <.IXIC> was down 0.46 points, or 0.02 percent, at 2,388.63.

(Reporting by Ellis Mnyandu)