Mortgage lender Resimac has included a US dollar hard-bullet (fixed maturity) tranche in its latest issue of mortgage-backed securities, which was launched yesterday.Resimac is seeking A$500 million through the issue of Resimac Premier Series 2013-1. The US$200 million A2-A notes will have a floating rate and a fixed maturity date of March 2014.Standard variable-rate mortgages make up 97 per cent of the loans in the collateral pool and three per cent are fixed rate.Interest-only loans make up 43.6 per cent of the pool and, of these loans, 48.7 per cent are investment loans.The average loan-to-valuation ratio is 70.9 per cent and all loans are full-documentation loans.Areas of high loan concentration include Blacktown, in Sydney (3.5 per cent of the pool), Illawarra, in New South Wales (3.3 per cent), inner Melbourne (3.2 per cent) and Gold Coast west (3.1 per cent).