"From here, it all hinges on the global environment really. It could go lower. But in saying that, the last [Fonterra] dairy price auction was a little firmer." Dairy products make up 42 per cent of the index.
Last month cheese prices fell 7 per cent, skim milk powder and butter 6 per cent, whole milk powder 4 per cent and casein 1 per cent.
The dairy sub-index is down 15.2 per cent from its most recent peak last March, and down 20.4 per cent in New Zealand dollar terms.
Kiwifruit prices fell 17 per cent. "This is consistent with the traditional season pattern as the export season winds down," Edwards said.
Other large falls in the basket were aluminium and beef, which eased 5 and 4 per cent, respectively. Lamb and sawn timber both dropped 1 per cent.
But skin prices rose 3 per cent and wool 1 per cent.