Summary: Here's everything you need to know before Tuesday's opening bell: Spotify will use a direct listing to begin trading today. Walmart is reportedly in talks to acquire online pharmacy start-up PillPack for under $1 billion. CBS is reportedly preparing an all-stock low-ball bid for Viacom . Fox said Disney could acquire Sky News . U.S. stock futures pointed higher after yesterday's tech selloff. Check out more videos over on YouTube:
