Reserve Bank governor Adrian Orr has stepped up his verbal war against the big four banks.

It's been revealed Orr sent a letter using 'colourful' language to defend the amount of capital the Reserve Bank requires these banks to hold.

NZ Herald Wellington business editor Jenee Tibshraeny explains the issue further.

LISTEN ABOVE

Reserve Bank governor Adrian Orr has stepped up his verbal war against the big four banks.
It's been revealed Orr sent a letter using 'colourful' language to defend the amount of capital the Reserve Bank requires these banks to hold.
NZ Herald Wellington business editor Jenee Tibshraeny explains the issue further.
LISTEN ABOVE

With a straight down the middle approach, Heather du Plessis-Allan Drive on Newstalk ZB delivers the very latest news and views to New Zealanders as they wrap up their day.