Issuance of prime jumbo and Alt A MBS continued to barrel along to new record levels in 2005, although the market formerly known as private-label MBS showed signs of slowing down late in the year, according to a new analysis and ranking by Inside MBS & ABS. A record $613.03 billion of prime/Alt A non-agency MBS were issued in 2005, a gain of 56.4 percent from the previous year. While the prime jumbo side… [Two data tables included]