Summary: Here's everything you must know before Monday's opening bell: Sprint fell premarket on fears that regulators would block its proposed $26.5 billion merger with T-Mobile . Walmart sold its U.K. supermarket business Asda to J Sainsbury for $10.1 billion. Marathon reportedly plans to buy pipeline and refining company Andeavor for more than $20 billion. Prologis PLD buys logistics-property rival DCT for $8.4 billion. U.S. stock futures pointed toward a higher open. Subscribe to our Youtube Channel for extended interviews, Cramer Replays, feature content, and more!
