The Dow Jones average was up 17.34 in today's trading closing at 5,586.06. New government data suggesting inflation is under control caused stocks to climb. The NYSE's composite index rose 1.54 to 343.40. The Standard & Poor's 500-stock index rose 2.30 to 640.85. The Nasdaq composite index rose 3.77 to 1,092.41. At the American Stock Exchange, the market value index rose 1.01 to 561.78.