Auditor KPMG tagged the report without qualifying its opinion, saying the key assumptions for Wrightson's goodwill valuation holds a "reasonable possibility of change that would cause the carrying amount of goodwill to exceed the recoverable amount."
Wrightson based its goodwill assumptions on the prospect of modest growth in its livestock over the next two years, continued growth in agriservices, a recovery in its Australian agritech market with significant expansion in South America.
"The directors believe that the planned growth per year for each cash generating unit, for the next three years is reasonably achievable and is consistent with the medium term growth rates for the industry," the statements said.
The statements said there were five key assumptions that could prompt the carrying value of goodwill to exceed the recoverable amount, without identifying them.
The board didn't declare a dividend. The shares rose 3.2 percent to 32 cents in trading yesterday, and have shed 18 percent this year. The stock is rated an average 'outperform' based on five analyst recommendations compiled by Reuters, with a median target price of 42 cents.
Since the June 30 balance date, Wrightson entered into a joint venture to create a molasses supply chain to import, transport and distribute molasses with International Nutritionals. The partner company is itself a joint venture between Fonterra Cooperative Group's RD1 and Australia's Wilmar Gavilon.
Wrightson flagged a $44.3 million guarantee contingent liability on certain loans sold to Heartland. The value of the loans was $29 million as at June 30, and has since reduced to $23 million. The guarantee relies on individual loans becoming impaired and put back to Wrightson in a three-year timeframe.