s estimates of 3. 5%. Everyday lower prices Still, tariff refunds helped to drive Walmart 15%)sank on Thursday after the retail titan's sales fell short of investors' expectations. The gains were fueled by a 23% rise in e-commerce sales, driven by a steadily expanding third-party marketplace and higher demand for in-store pickup and delivery services. comparable sales, which include revenue from stores open for at least one year, grew by a modest 2. The discount store chain plans to relieve some of the pressure as it seeks to gain market share.