NEW YORK, Sept 10 (Reuters) - U.S. stocks extended gains on Thursday, with S&P 500 index gaining 1 percent as a brighter outlook from Procter & Gamble and a successful Treasury bond auction encouraged investors about an economic recovery.
The Dow Jones industrial average was up 73.76 points, or 0.77 percent, at 9,620.98. The Standard & Poor's 500 Index was up 1 percent before gains to 10.01 points, or 0.97 percent, at 1,043.38. The Nasdaq Composite Index was up 22.11 points, or 1.07 percent, at 2,082.50. (Reporting by Angela Moon, Editing by Kenneth Barry)