Firstmac launched its residential mortgage backed securities (RMBS) transaction, Firstmac Mortgage Funding Trust No.4 Series 1-2018 (Firstmac 1-2018), on 6 March. The total volume of the transaction is a minimum A$500 million (US$388.6 million), including the US dollar denominated Class A1-U notes. The Class B, Class C, Class D, Class E and Class F notes are not for sale.