Fannie Mae, Freddie Mac and the FHA financed a record $31.2 billion in so-called conforming jumbo mortgages during the third quarter of 2012, according to a new Inside Mortgage Finance ranking and analysis. Business in conforming jumbo loans – defined as mortgages on one-unit properties that exceed $417,000 – rose 29.6 percent from the second quarter and represented the highest quarterly volume for the agencies since emergency loan limits went into effect back in 2008. Since that time, an estimated $363.0 billion of conforming jumbo mortgages have been originated. Conforming jumbo originations for the first nine months of 2012 reached...[Includes three data charts]