Walmart’s secret “store of the future” unveiled, Starbucks’ loyalty-powered record high, and 3M’s worst day since ‘87

Summary: Starbucks announced the return of the S’mores Frappuccino, but we’re focused on what its new loyalty program change means to your daily routine. Walmart has been cooking up a “store of the future” out of its Long Island-based lab, so we checked it out. And post-it note creator 3M’s worst day in 32 years highlights what’s wrong with the Dow Jones Industrial Average.