The Dow Jones Industrial Average finished a day above the 40,000 level for the first time as U.S. stock indexes drifted around their record heights to close their latest winning week. The Dow rose 134 points, or 0.3%, Friday, a day after briefly topping the 40,000 level for the first time. The S&P 500, which is much more widely followed on Wall Street, added 0.1%. It finished just 0.1% shy of its record set on Wednesday and delivered a fourth straight week of gains. The Nasdaq composite slipped 0.1%. Treasury yields ticked higher in the bond market.