NEW YORK, July 16 (Reuters) - U.S. stocks rallied for a fourth day on Thursday after JPMorgan's robust results added to growing optimism about the quarterly earnings season and technology shares rose in anticipation of more good news.

* The Dow Jones industrial average .DJI gained 95.23 points, or 1.11 percent, to end unofficially at 8,711.44. The Standard & Poor's 500 Index .SPX rose 8.05 points, or 0.86 percent, to finish unofficially at 940.73. The Nasdaq Composite Index .IXIC added 22.13 points, or 1.19 percent, to close unofficially at 1,885.03. (Reporting by Chuck Mikolajczak; Editing by Jan Paschal)