The big numbers being posted in the mortgage market this year are poised to topple a number of industry records, and one of the first to go may be total mortgage-conduit securitization activity. Through the first nine months of this year, issuers of private-label mortgage-backed securities and asset-backed securities collateralized by nonconforming mortgages – mostly jumbo and subprime loans – pumped out a total of $156.79 billion in new issues. The 12-month record for the