Lehman Brothers’ multipurpose MBS securitization shelf, Structured Asset Securities Corp., was the most active issuance vehicle in the non-agency mortgage securities market during the first half of 2005, according to a new Inside MBS & ABS ranking. SASCO pumped out a total of $41.65 billion of new non-agency MBS during the first six months of the year, an increase of 37 percent over the same timeframe in 2004 (see next page). While the biggest chunk… [One data table included]