Faced with a deluge of requests for low deposit loans, Resimac New Zealand announced a tightening of its lending criteria on Friday, and an increase in margins for those loans with the lowest deposits.The Reserve Bank of New Zealand limited the growth of mortgages from banks with a loan- to-value ratio of more than 80 per cent to 10 per cent of new mortgage flows from October 1.The rules do not apply to non-banks, though New Zealand's finance companies were decimated between 2007 and 2010, and the non-bank sector's lending constitutes just over one per cent of total mortgage lending by banks.Resimac announced to brokers that it will prioritise previous broker clients over new clients, and favour those bringing a balanced range of loans with LVRs both above and below the 80 per cent threshold.Resimac also said it was introducing a hard LVR cap of 90 per cent on its loans, where previously it had lent up to 95 per cent. It also increased it low equity margin for 80 to 85 per cent LVR loans to 50 basis points, and lifted its 85 to 90 per cent LVR margin to 90 basis points. Borrowers will also be charged the low equity premium for the total loan amount, including fees, rather than just for the basic loan. Meanwhile, finance company NZF Group has announced the sale of a 20 per cent stake in Resimac NZ Home Loans, and of notes in two securitisation trusts for Australia's Resimac Financial Services, for NZ$1.25 million. Resimac already owns the remaining 80 per cent in Resimac NZ Home loans.