The Justice Department filed an antitrust lawsuit against American Express Monday, alleging that the financial institution has been engaging in anticompetitive practices. Justice also said it reached a proposed settlement with Visa and MasterCard over similar charges. Continue reading American Express Sued by Antitrust Division for Unfair Merchant Rules American Express Sued by Antitrust Division for Unfair Merchant Rules originally appeared on DailyFinance on Mon, 04 Oct 2010 15:46:00. Filed Under: Company News , American Express , Credit , MasterCard , Visa Permalink | Tweet this! | Comments