As it stands, Fonterra's farmgate milk price for 2016/17 is just $4.25 a kg - $1 short of the estimated average cost of production - although some commentators expect the milk price to be revised up as the season progresses.
David Tripe, an associate professor at Massey University, said dairy farm prices were clearly on the way down but that the decline could have been worse given the steep slide in dairy product prices since the peak of $8.40 a kg of milk solids in 2013/14.
"This is not as bad as the worst case scenario in the Reserve Bank's stress tests," Tripe said. "I think that there is a fair bit of 'wait and see' with this in terms of its severity and its potential impact on the banks."
Bank lending to the dairy sector currently stands at around $38 billion - about 10 per cent of the banking system's total lending.
REINZ's data put the median price per hectare for all farms sold in the three months to June at $26,361 - down 9.54 per cent on the same three months of 2015.
The institute's All Farm Price Index fell by 2.8 per cent in the three months to June compared with the three months to May and by 4.3 per cent compared with June 2015.
"From a pricing perspective, the Dairy Farm Prices Index indicates an easing of 18 per cent in the last 12 months, but only a 2.2 per cent drop from five years ago," said REINZ rural spokesman Brian Peacocke.
Fonterra, in its latest market update, said the problems that have afflicted the world market over the past two years - overproduction and slack demand from China - were showing signs of improvement.
European Union milk production in April increased 1 per cent compared to the same month last year - the lowest rate of increase since early 2015 with half of the top eight producers decreasing production compared to the same month the previous year.
On the demand side, China dairy imports increased by 30 per cent or 47,000 tonnes in May compared to the same month last year.
Futures market trading suggests that prices at tomorrow's GlobalDairyTrade auction will be flat to slightly weaker.