Community-owned TSB Bank and state-owned Kiwibank have retained their credit ratings after the latest round of revisions conducted by Standard and Poor's under its ratings criteria for banks.
S&P said the rating on New Plymouth-based TSB will remain at BBB plus, with a stable outlook.
The rating on KiwiBank will stay at AA minus, also with a stable outlook.
NZX-listed Heartland, which has ambitions to obtain a banking licence, kept its investment-grade BBB minus rating, but the company's ratings outlook improved from "negative" to "stable".
Last week, Australia's big four banks - National Australia Bank, Westpac, Commonwealth Bank of Australia and ANZ - and their New Zealand offshoots, were downgraded by S&P to AA minus from AA.
