Indeed, "the average price for whole milk powder to ship in January actually rose 0.8 per cent, indicating there is some medium term need for product," Castleton noted.
At the latest GDT auction, cheddar slid 1.8 per cent to US$3,404 a tonne, while rennet casein declined 1.7 per cent to US$5,426 a tonne.
Skim milk powder was steady at US$1,977 a tonne.
Meanwhile, anhydrous milk fat rose 1 per cent to US$5,106 a tonne, lactose gained 1.5 per cent to US$926 a tonne, and butter climbed 2.4 per cent to US$4,114 a tonne.
"Demand for milk fats has been fairly solid, but the available supply seems have been outweighing demand in recent months," said Castleton.
"The GDT result will spur hopes that a corner has been turned in the milk-fat market—but it is too early to say whether prices will continue to rise."
Butter milk powder and sweet whey powder were not offered at this event.
The New Zealand dollar last traded at 65.95 US cents as of 1.09pm in New York, compared with 65.51 US cents at the previous close in Wellington.
There were 137 winning bidders out of 183 participating at the 15-round auction. The number of registered bidders was 511, up from 506 at the previous auction.