 is up 37, closing at 18,509. The Dow tracks the 30 of the most valuable public companies in the U.S. It's now up 8% on the year and nearly 18% over this time last year. Sales at U.S. retailers were flat in June because of falling gas prices and the nationwide cyber attack on auto dealers, but most of the other agencies showed an increase in spending, a sign of a stable economic growth for the economy today.