The Fonterra Shareholders' Fund unit price took a big hit on the back of the news, dropping back by 10 per cent to $5.50, equal to its issue price and well down on its initial price of $6.66 when they listed on the NZX in November last year. By the close the units had clawed back some ground, trading at $5.75, down 35c from Tuesday's finish.
Economists had expected an upward revision to the farmgate milk forecast - thanks to high GlobalDairyTrade auction prices. Indeed - if the board had not opted to take the action that it did, the farmgate price could have struck $9 a kg, but chairman John Wilson said the cost of maintaining the dividend at 32c would have been too great, putting pressure on its balance sheet.
Milk powders were continuing to sell at high prices because of strong global demand and limited supply.
Just four months into the season, the co-operative was in an "extraordinary" situation, with the gap between prices for milk powders compared to cheese and casein being greater than ever. In abnormal circumstances, the board had the discretion to pay a lower farmgate milk price than specified under the manual.
Spierings said the current market dynamic meant Fonterra needed to face the strategic question of whether it should have more processing capacity in milk powder and less in products such as cheese and casein.
"This is kind of unique - it has never happened before - and the gap (between the product streams) is widening," Spierings said.
He said the big question facing Fonterra was whether the gap was temporary, or "the new reality" given the explosive demand for milk powder from China.
"It's a strategic question that the co-operative needs to ask," Spierings said.
ANZ Bank rural economist Con Williams said he expected the trend in dairy product markets to continue.
Williams said: "Personally, I'm of the view that it's more structural than temporary, which means that you are going to have a lower dividend over the longer term, and a lower unit price, by inference."