July 27 (Reuters) - U.S. stocks added to their record levels at the open on Thursday, helped by a flurry of strong corporate earnings reports that boosted sentiment.
The Dow Jones Industrial Average rose 49.59 points, or 0.23 percent, to 21,760.6. The S&P 500 gained 3.9 points, or 0.15 percent, to 2,481.73. The Nasdaq Composite added 32.93 points, or 0.51 percent, to 6,455.67.
(Reporting by Tanya Agrawal; Editing by Anil D'Silva)