At the latest GDT auction, skim milk powder rose 0.8 per cent to US$1,959 a tonne.
Meanwhile, rennet casein plunged 9.5 per cent to US$4,602 a tonne, while butter sank 8.1 per cent to US$4,953 a tonne.
"Ahead of the event, the NZX Dairy Derivatives market had expected a flat result for butter prices," Castleton noted. "This decline places Oceania as the cheapest source for butter."
Anhydrous milk fat dropped 5.2 per cent to US$5,629 a tonne, while cheddar gave up 3.3 per cent to US$3,596 a tonne.
Buttermilk powder traded at US$2,225 a tonne.
For sweet whey powder and lactose, neither an index nor price was available.
The New Zealand dollar last traded at 67.88 US cents as of 2.49pm in New York, compared with 67.77 US cents at the previous close in Wellington.
There were 126 winning bidders out of 168 participating at the 15-round auction. The number of registered bidders was 524, the same as at the previous auction.
- BusinessDesk