Anhydrous milk fat eased 1.7 per cent to US$6,222 a tonne.
Meanwhile, skim milk powder gained 0.3 per cent to US$2,051 a tonne, while rennet casein rose 2.7 per cent to US$5,015 a tonne.
Lactose climbed 3.9 per cent to US$714 a tonne, while buttermilk powder jumped 17.7 per cent to US$2,314 a tonne.
"The most surprising result was butter milk powder," Castleton noted. "There seemed to be some fierce competition for buttermilk powder, with prices up significantly in all contract periods."
For sweet whey powder, neither an index nor price was available.
The New Zealand dollar last traded at 70.25 US cents as of 12.24pm in New York, compared with 70.29 US cents at the previous close in Wellington.
There were 118 winning bidders out of 179 participating at the 15-round auction. The number of registered bidders fell to 519, down from 527 at the previous auction.
- BusinessDesk