A sharp decline in whole milk powder prices looks likely at the twice-monthly GlobalDairyTrade auction on Thursday, with futures market pricing suggesting a drop of about 8 per cent.
Whole milk prices - which are responsible for about 75 per cent of Fonterra's farmgate milk price - fell by 10.8 per cent at the last sale on July 2 to US$2054 a tonne.
Fonterra's farmgate milk price forecast is $5.25 a kg of milksolids for the current 2015/6 season.
Most banks have lowered their farmgate milk price expectations, and ANZ has dropped its forecast for this season to $4.50 per kg of milksolids compared with its previous forecast of $5-$5.25 a kg.
"The next seven or eight GlobaldairyTrade auctions could be brutal with higher seasonal volumes to shift and anecdotal reports that many buyers' immediate requirements are covered," said ANZ rural economist Con Williams.