Brian Mackey, deputy director of research at Adviser Investments, has the market analysis for Thursday, August 16. The Dow Jones Industrial Average’s 1.6% advance led gains across the major U.S. stockA financial instrument giving the holder a proportion of the ownership and earnings of a company. indexes today; the S&P 500 and NASDAQ Composite closed the day up 0.8% and 0.4%, respectively. Meanwhile, Walmart rose 9% after beating both earnings and revenue expectations. J.C. Penney’s stock plummeted 27% on disappointing earnings, wider loss expectations and the retailer’s ongoing leadership vacuum following the May resignation of Chief Executive Officer Marvin Ellison.