American Express Company’s (AXP) shares have risen 37.2% in the year-to-date period, outperforming the industry’s growth of 6.5%. It also outperformed its peers like Mastercard Incorporated (MA) , Visa Inc. (V) , and Euronet Worldwide, Inc. (EEFT) , which have gained 3.9%, 10.6% and 3.5%, respectively, in the same time frame.A strong revenue growth outlook, continued growth in card fees, and discount revenues are buoying the company’s price performance. AXP expects its long-term revenue and EPS growth to be ...