[Opinion] Why does ASB not disclose how much advisers write for the bank?

But there are several reasons to believe that advisers likely account for more than 60% of ASB's net new mortgages.

One is that ASB has relied heavily on advisers for expanding beyond its home market in Auckland and has generally been supportive of the advisory industry, especially in the regions.

Another is that ANZ reported that advisers accounted for 59% of its net new mortgages in the six months ended March 31 and Westpac NZ reported that advisers originated 64% of its net new mortgages.

In February, Kiwibank said about 70% of its mortgages by volume were coming from advisers with 47% coming from third party advisers and the rest from sister company NZ Home Loans.