STEVENSON, Md.--(BUSINESS WIRE)--The securities litigation law firm of Brower Piven, A Professional Corporation, announces that a class action lawsuit has been commenced in the United States District Court for the Southern District of Florida on behalf of purchasers of Nationstar Mortgage Holdings Inc. (“Nationstar” or the “Company”) (NYSE: NSM) common stock during the period between February 27, 2014 and May 4, 2015, inclusive (the “Class Period”). Investors who wish to become proactively invo