Take context from the input text and decide on the accurate relationship between 'Fonterra' and 'milk' from the options provided.
Options: product/material produced, legal form, director/manager, stock exchange

Whole milk powder prices fell to a six-year low at auction overnight, prompting ASB and ANZ to cut their forecasts for Fonterra Cooperative Group’s milk payout to farmers in the 2015-16 season.
product/material produced