Stock exchange operator NZX says it will ramp up its efforts to help investors understand how it regulates the market this year in a bid to allay concerns around its handling of investigations.
Chief executive Tim Bennett said it would never be able to provide transparency on individual cases but hoped to build trust in the process by explaining it better and ensuring improved communication with those who complained.
"We need to communicate what we do and we need to do it more effectively with investors."
Last year the NZX undertook 145 formal investigations of which nine were sent to its market disciplinary tribunal - an increase on five in the year before.
It also slashed its referral time in half from eight months to four and completed 90 per cent of its investigations within four months.