The Veterans Administration’s home loan guaranty program has racked up some serious refinance numbers in recent months, causing primary mortgage insurers to lose some market share during the first quarter of 2015, according to an Inside Mortgage Finance analysis of guarantor activity. Streamline refinance loans accounted for 59.0 percent of VA loans securitized by Ginnie Mae during the first three months, compared to just 32.8 percent of private MI loans securitized by Fannie Mae and Freddie Mac over the same period. In addition, the VA had the highest average loan size among insured mortgages in the first quarter, approximately 7.2 percent larger than the average loan with private MI. Private mortgage insurers provided coverage on $45.2 billion of mint conventional mortgages during the first quarter, down 5.3 percent from the fourth quarter of last year. VA and FHA originations also increased over the same period by 6.0 percent and 5.5 percent, respectively. FHA forward originations surged ... [1 chart ]