Mortgage securitization rates remained at record levels through the first half of 2011, reflecting a sharp decline in new primary market production and a surge of agency issuance early in the year. A new Inside MBS & ABS analysis reveals that mortgage securitization activity in the first half of 2011 equaled 96.0 percent of loans originated during the same period. That compares to an 84.9 percent securitization rate for all of 2010 and an 85.6 percent rate – the record high – back in 2009. Because it can take weeks or even months before a newly originated mortgage hits the capital markets as collateral backing an MBS, there is a significant slippage between... [Includes one data chart]