The federal agency caretaking Fannie Mae and Freddie Mac extended the streamlined refinance program for underwater mortgages at the government-sponsored enterprises for an extra two years, although it remains unclear how much gas is left in the tank. A new analysis of GSE securitization data by Inside Mortgage Finance suggests that activity under the Home Affordable Refinance Program increased by only 1.3 percent during the first quarter of 2013. A total of $69.0 billion of refinance mortgages with loan-to-value ratios exceeding 85 percent were securitized by Fannie and Freddie in the first three months of the year, representing the highest quarterly volume in the evolving program’s four-year history. Most of the increase came...[Includes two data charts]