NEW YORK, Oct 19 (Reuters) - U.S. stocks extended gains on Monday on earnings optimism, with the Dow index rising 1 percent, led by gains in Caterpillar Inc (CAT.N).
The Dow Jones industrial average .DJI was up 101.27 points, or 1.01 percent, at 10,097.18. The Standard & Poor's 500 Index .SPX gained 9.90 points, or 0.91 percent, at 1,097.58. The Nasdaq Composite Index .IXIC rose 17.78 points, or 0.82 percent, at 2,174.58.
Caterpillar shares were up 4.8 percent at $57.17 after several positive brokerage notes.
Reporting by Angela Moon, Editing by Jeffrey Benkoe