NEW YORK, June 5 (Reuters) - U.S. stocks added to modest gains after the Institute for Supply Management's services index came in a touch higher than expectations.
The Dow Jones industrial average gained 20.21 points, or 0.17 percent, to 12,121.67. The Standard & Poor's 500 Index added 4.21 points, or 0.33 percent, to 1,282.39. The Nasdaq Composite Index rose 11.50 points, or 0.42 percent, to 2,771.51.
Reporting By Chuck Mikolajczak; Editing by Padraic Cassidy