While many of the largest mortgage lenders in the industry continue to scale back their operations in a somewhat precarious operating environment, a few companies see opportunity in the reshuffling and are hitting the gas pedal. None more than Nationstar Mortgage. Fresh off an initial public offering, the company has been on a buying spree for mortgage servicing and production capacity. Although Nationstar ranked as the 11th largest servicer in the market at the end of March, pending acquisitions would push it all the way to fourth place on a pro forma basis, according to a new...(Includes one data chart)