 Shares of Fiserv Inc. FISV, 1.47 were rising 1.5 in morning trading Thursday after Evercore ISI analyst David Togut turned bullish on the merchant-acquiring stock, writing that the company is in the early stages of a transformation that seems to be paying off. In the process, FISV has modified its historically successful playbook of maximizing free-cash flow, repurchasing 6 of stock annually, then repeat, Togut wrote. 