(Updates to open)
By Megan Davies
NEW YORK, May 26 (Reuters) - U.S. stocks opened higher on Thursday after government data showed the U.S. economy grew more vigorously in the first quarter than previously thought.
The Dow Jones industrial average was up 42.34 points, or 0.40 percent, at 10,500.14. The Standard & Poor's 500 Index was up 3.54 points, or 0.30 percent, at 1,193.55. The Nasdaq Composite Index was up 8.25 points, or 0.40 percent, at 2,058.37.