The private mortgage insurance business saw a jump in its share of the primary MI market during the second quarter, and all six active firms racked up solid gains in earnings, according to a new Inside Mortgage Finance analysis and ranking. Private MIs reported $70.65 billion in new primary MI written through traditional flow business activity during the second quarter. That was up 38.4 percent from the first three months of the year, though still slightly below the pace set in late 2016. Meanwhile, the government-insurance market faltered...[Includes two data tables]