James Georgeson, AMP's chief risk officer, said the company had dedicated significant resources to realising the money for investors.
"There have been very few instances throughout the GFC [global financial crisis] where mortgage based funds have delivered a full return of principal as well as an interest payment.
"In fact, for many it led to significant financial losses and hardship."
Georgeson said the inaccessibility of a frozen fund was often a challenging period for investors but it had successfully delivered on the objectives set up when the decision was made to wind-up the fund.
The money was invested in first-ranking commercial mortgages, fixed-interest securities and cash.
There were around 2800 retail investors.