The overall mortgage securitization fell sharply in the second quarter of 2018 as Fannie Mae and Freddie Mac MBS issuance failed to keep pace with a surge in conventional-conforming mortgage originations in the primary market. During the second quarter, just 65.8 percent of newly originated mortgages were pooled in MBS, down from 71.7 percent in the first three months of the year and a 70.3 percent rate for all of 2017, according to a new Inside MBS ... [Includes one data chart]