Mortgages guaranteed by the Department of Veterans Affairs accounted for 29.4 percent of insured home loans securitized in the agency mortgage-backed securities market in the fourth quarter of 2016, a new Inside Mortgage Trends analysis reveals. That was up from a 27.2 percent share for the VA during the third quarter. The home-loan guaranty program has become a refinance dynamo, accounting for a whopping 44.6 percent of insured refi loans ... [Includes one data chart]