 Today and tomorrow is when investors who've lately been thinking of Amazon mostly as an AI and cloud computing company get reminded that at its core, it's a retailer. Investors are watching this year's Prime Day event closely, not just for its revenue potential, but to see what improvements Amazon has made with logistics and efficiency. It's a 30-year-old brand, but Walmart will try using it to attract teens and 20-somethings. Walmart relaunching its No Boundaries label with 130 of the collection's fashion items costing 15 bucks or less.