Sept 15 (Reuters) - The Dow inched up to hit a record high at the open on Friday, with the S&P 500 and Nasdaq little changed, as investors shrugged off North Korea's latest missile test and slightly tepid economic data.
The Dow Jones Industrial Average rose 31.85 points, or 0.14 percent, to 22,235.33. The S&P 500 lost 0.18 points, or 0.007 percent, to 2,495.44. The Nasdaq Composite added 1.57 points, or 0.02 percent, to 6,430.66. (Reporting by Tanya Agrawal; Editing by Savio D'Souza)