Early indicators suggest that private mortgage insurers saw an uptick in new business during the third quarter, a time when most mortgage production indicators were losing momentum. Fannie Mae and Freddie Mac securitized a total of $58.18 billion of single-family loans that were insured by private MIs during the third quarter, according to a new Inside Mortgage Finance analysis of loan-level detail. That was up 3.7 percent from the second quarter at a time when total production by the two government-sponsored enterprises declined by 15.6 percent. Private MI-insured loans accounted...[Includes two data charts]