Prices of dairy products sold on Fonterra's GlobalDairyTrade platform fell for the third time in four sales with declines for all six product types on offer.
The GDT-TWI Price Index fell 0.9 per cent from a fortnight ago. The average winning price across all products dropped to US$3666 a metric tonne.
The price of whole milk powder - usually more than half the product sold - fell 0.9 per cent to US$3533.
A total of 28,011 tonnes of product was sold, down from 31,026 tonnes.
Skim milk powder fell 0.5 per cent to US$3296 a tonne. Anhydrous milk fat dropped 3.5 per cent to US$3942 a tonne and cheddar declined 1.1 per cent to US$3640 a tonne.
Milk protein concentrate fell 4.9 per cent to US$5569 a tonne and rennet casein dropped 4.3 per cent to US$7715 a tonne.
There were 118 winning bidders from a total 155 participants.