But the regulator has now missed that deadline and a spokeswoman on Friday could not say when this update would be delivered to the market.
The commission earlier this year said it was continuing to receive and process complaints about the swaps, which are a financial derivative product that allows borrowers to manage the interest rate exposure on their borrowing.
They are usually offered to companies, but the commission said that from 2005 some banks offered them to rural customers throughout New Zealand.
In August 2012, the commission began looking into whether these interest swaps were misleadingly marketed to those customers.
The Financial Markets Authority also said earlier this year it was probing whether the sales or marketing of the swaps have breached laws.
The commission, which received more than 140 complaints about how the swaps were sold, said in May it was not clear how much money farmers had lost as a result of the alleged conduct.