Walmart’s stock approaches an all-time high after same-store sales growth in the 1st quarter was the strongest in nearly a decade. Seth Jayson analyzes Walmart’s ability to steadily improve e-commerce sales. SpaceX gets ready to launch satellites with an aim towards building a high-speed internet network. And with Berkshire-Hathaway’s latest 13-F filing, we discuss Warren Buffett and his team buying Amazon, selling Phillips 66, and trimming its position in Southwest Airlines.