Groupon Shares Down, Whole Foods Disappoints, Jim Cramer's Bargain Pick

It's going to be a big earnings day today: Tesla, Zillow, Keurig Green Mountain, King Digital and Molson Coors Brewing will all report earnings over the course of the day. Yesterday's announcements--coming from Groupon and Whole Foods Market--spooked investors, and started an after-market sell-off yesterday. And Jim Cramer sees one stock that is trading at a relative discount in an otherwise over-hyped market.