Mortgage bankers reported stronger corporate income during the fourth quarter of 2011, but profitability was generally lower on a per-loan basis, according to the most recent performance report released by the Mortgage Bankers Association this week. Based on a survey of some 310 mortgage bankers, the study found average pretax income of $1.51 million per company in the fourth quarter, up 34.8 percent from the third quarter of last year. That brought the average pretax income for the year to $3.69 million, down 14.2 percent from 2010. Average profits per loan were generally down in the fourth quarter, even...