Lennar’s purchase of rival CalAtlantic Group creates the largest homebuilder in the U.S.  Taylor Muckerman and Jason Moser analyze the deal and the future for homebuilding stocks.  Macy’s hits an 8-year low. Ellie Mae reports earnings.  And Constellation Brands buys a 10% stake in Canopy Growth Corp., a publicly-traded cannabis company with an all-time great ticker symbol.