Nationstar Mortgage (NSM) reported fourth-quarter results this morning that breezed past Wall Street's forecasts, although shares opened down nearly 3%. The specialty mortgage servicer earned 71 cents a share, 2 cents above views. Revenue jumped 180% from the earlier year to $332.6 million, topping forecasts by $27 million. Nationstar's servicing portfolio at year-end stood at $208 billion, up 94% from 2011's ending balance. It swelled to $300