Most of the top mortgage originators of agency-eligible home loans posted significant declines in MBS issuance during the second quarter, but a handful of firms bucked the current, according to a new ranking and analysis based on the Inside Mortgage Finance MBS Database. Overall agency MBS production declined 33.8 percent from the first quarter to the second, hitting its lowest three-month volume since the end of 2008. Through the midway point in 2011, single-family mortgage securitization by Fannie Mae, Freddie Mac and Ginnie Mae was off ... [includes two data charts]