Visa stock is rallying in lockstep with the broader payment processing industry.After selling off this past summer, Dow Jones Industrial Average component Visa (V 0.37%) has rallied almost 10% during the past month. Here's why the financial stock just reached a new all-time high and has the potential to keep going.A numbers gameVisa generates revenue every time one of its debit or credit cards is swiped, tapped, or processed on mobile, desktop, or in person. The company's fee structure allows it to benefit ...