In the conventional-conforming sector, the securitization rate rose to 71.4% from 68.8% as Fannie Mae and Freddie Mac churned out new MBS faster than the market was making new loans.
Freddie MBS represented 3.7% of the collateral backing Fannie Supers in the second quarter, the highest level of commingling since the GSEs imposed new fees on such activity a year ago.