Preliminary ratings have been assigned to a new residential mortgage-backed securities (RMBS) deal from FirstMac. FirstMac Mortgage Funding Trust Series 1-2011 has a launch volume of A$175.6 million (US$185.3 million) and represents the borrower's first securitisation issue of the year, although it issued twice in 2010: a A$338.9 million restructure issue in May and a A$416 million new deal in September.