An estimated 82.8 percent of single-family mortgages originated in 2011 ended up being financed through securitization, according to a new Inside MBS & ABS analysis. That’s the second highest level on record, falling slightly below the 84.4 percent securitization rate in 2009. Virtually all government-insured mortgages are securitized through the Ginnie Mae program, which securitized some $284.6 billion in newly originated FHA and VA loans last year. The big increase in securitization rate came in the conventional conforming market, where high loan limits have greatly expanded (Includes one data chart)...