The surge in non-agency MBS issuance during the second quarter brought with it a record $77.3 billion of jumbo mortgages – home loans that exceed the purchase limits for Fannie Mae and Freddie Mac – according to a new analysis by Inside MBS & ABS. Jumbo securitization spiked 57.6 percent higher than in the first three months of the year, bringing year-to-date issuance to $126.4 billion.