The A$500 million (US$398.5 million) minimum prime residential mortgaged-backed securities (RMBS) transaction for Firstmac progressed to launch on 19 September. Firstmac Mortgage Funding Trust No. 4 Series 2-2017 (Firstmac 2017-2) is expected to price on 22 September, according to arranger National Australia Bank and additional lead managers ANZ, J.P. Morgan and Westpac Institutional Bank.