Chipmaker Ambarella falls on lowered guidance. Jason Moser analyzes Dave & Buster’s new all-time high and whether Pepsi shares are now in a different category than Coca-Cola’s.  Plus we dip into the Fool Mailbag to analyze the future of Boston Beer Co. Thanks to Casper for supporting The Motley Fool.  Save $50 on a mattress at www.casper.com/fool and use the promo code “fool”.