The best bank stock to buy? This credit card company’s By: MarketWatch April 25, 2014 at 06:00 AM EDT The often-overlooked Discover Financial Services has huge advantages over its banking rivals, writes Phil van Doorn. Read More >> Related Stocks: Ally Financial American Express Citigroup Discover Financial Services Goldman Sachs Group JPMorgan Chase & Co MasterCard Morgan Stanley Standard & Poors 500 Visa