Walmart is one of the most mentioned companies in the U.S. across all news items in the past 12 hours, according to Factiva data. Walmart posted strong second-quarter sales and higher profits, and executives said they don’t see signs of fraying demand. Walmart said that its U.S. comparable sales, which measures both stores and e-commerce, rose 4.2% in the quarter, a faster pace than in the previous two quarters. Executives said shoppers are gravitating to deals as well as the convenience of online order pickup and delivery, which led to customer gains, especially among higher-income shoppers. Dow Jones & Co. owns Factiva.