The private mortgage conduit business continued to expand during the second quarter of 2005 as major mortgage bankers and Wall Street investment houses churned out $204.57 billion of new conduit deals. The second-quarter surge in conduit securitization reflected ongoing strength in the Alternative A and prime jumbo sectors, according to data collected by Inside MBS & ABS, an affiliated newsletter. Conduit securitization volume rose 7.5 percent from the first three months of 2005 to the…