The bank's mortgage book grew $1.31 billion to $27.27 billion in the latest three months. Using Reserve Bank of New Zealand figures as a proxy for the market, that means it wrote nearly 26% of all mortgages written by registered banks in the quarter, lifting its market share to 20.3% from just over 20% three months earlier and compared with 19.5% in March last year.
Kiwibank's mortgage book has also continued to grow, reaching $3.14 billion at the end of March, putting its market share at 2.3% compared with 1.9% in March last year.
ASB Bank, previously the biggest winner in the mortgage price war, lost ground for a second consecutive quarter. While its mortgage book grew $1.02 billion to $32.18 billion, its market share slipped slightly to 23.9% in March from 24% in December and in March last year.
ANZ/National Bank also lost a little market share although its mortgage book grew by $1.54 billion to $46.4 billion.
Bank of New Zealand, TSB Bank and HSBC have yet to file their March quarter documents.
