The latest GDT auction, which is operated by New Zealand milk giant Fonterra, showed prices overall up by 12.7% from the last auction, held two weeks ago. Whole milk powder prices rose by 18.9% over the same period.
The rise in physical whole milk powder prices followed on from a strong gain on the New Zealand futures markets.
But the physical rally exceed expectations, breaking a trend where commodity milk buyers have proved to be less bullish than speculators on the futures exchanged.
Whole milk powder has been outperforming skimmed milk powder over the past three auctions, bringing the premium of whole milk powder to $667 a tonne.
This is the highest premium of whole milk powder to skimmed milked powder is at the highest level since October 2013.
The whole milk powder market is tightening globally, as output from New Zealand, which is by far the world's biggest exporter, is shrunk due to falling milk output, due to lower farm-gate prices.
According to the European Commission, whole milk powder exports from New Zealand were down 6% in the January to May period, compared the same time last year.
And demand from the world's top whole milk powder importers is booming as China has returned to the market in full force, following a long period of depressed imports as the country worked through heavy stocks.
Chinese whole milk powder imports were up 20% in the January to May period. Demand from Russia is also up, by 8% over the January to May period. ■
What to read next
More inside POST
BlackBerry plans to move to NYSE Companies
Scotland rejects fracking Politics