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 New York on behalf of purchasers of American Express Company (“AmEx” or the “Company”) (NYSE: AXP) common stock during the period between October 16, 2014 and February 11, 2015, inclusive (the “Class Period”). Investors who wish to become proactively involved in t