Fonterra last week announced its production was expected to fall by 2-3 per cent, but the co-op has hinted that the decline could be far greater that.
Private forecasters are looking at a 5 to 10 per cent reduction, based on a bigger-than-expected cow cull and reduced use of supplementary feed.
See recent changes in the GlobalDairyTrade auction here:
The wildcard for forecasters is the current El Nino weather pattern, which could lead to a drought, which would further impede production.
A weaker production backdrop, combined with a change in product mix and desire by Fonterra to sell a smaller proportion of supply through the GDT platform, have seen further reductions in GDT volumes.
This should be price supportive with the volume of wholemilk powder to be sold via GDT this year now forecast to be 21 per cent lower than last year and 37 per cent below the record 600,000 MT that were sold in 2013/14.
"But this does need to be offset with consideration of a demand side that still looks fairly subdued, and supply competition from Europe, which remains high for now," ANZ's rural economist Con Williams said.
There was plenty of evidence that China's import demand for powders remained fairly lacklustre by historical standards, with higher domestic supply often given as a reason.