Guaranty-fee income increased in 2015 at Fannie Mae and Freddie Mac despite the fact that average g-fees on new business acquisitions were down slightly. The two government-sponsored enterprises reported a combined $17.33 billion in net income for all of last year, a 20.9 percent drop from 2014. However, g-fee income at the two GSEs was up 8.2 percent from 2014 to 2015, and continued to account for a growing share of their income as their investment portfolios shrank. G-fee income did not climb...