"Decisions on our capital composition are a matter for our shareholders and the Kiwibank board," he said.
The RBNZ has been reviewing the definition of bank capital, the measurement of risks that the banks face, and the minimum capital requirements and buffers to set up a regime that provides confidence in the banking sector. It wants to complete a review of banks' capital settings by early next year.
In July, the central bank released a second options and issues paper on a wide-ranging review of the system's capital framework. It proposed limiting common equity and preference shares as the only allowable instruments qualifying as Tier 1 capital, and long-term subordinated unsecured debt without triggers that freeze interest payments as Tier 2 capital. Other instruments would still be available for banks to use to fund their operations but wouldn't go towards the regulated capital levels.