Perpetual's new chief executive, Chris Ryan, said the company remained committed to its securitisation trustee and mortgage-servicing business, despite falling volumes and margin pressure.Ryan, who took over as CEO of the wealth management company in February, briefed analysts yesterday on the results of a strategy review.He said the businesses in the corporate trustee division - securitisation trustee services, mortgage services and fund services - were important components of the group and provided earnings diversification. The corporate trust division produced a pre-tax profit of A$32.3 million in the 2009/10 financial year, down from $36.1 million the year before. It contributed 24 per cent of group pre-tax earnings.Securitised assets under administration fell from $241 billion to $210 billion during the year, and revenue from trust and fund services fell five per cent to $55.6 million.Perpetual is Australia's leading securitisation trustee. The Australian Bureau of Statistics reported yesterday that total liabilities of securitisers stood as $135.8 billion in the March quarter, down 2.1 per cent on the previous quarter and continuing the declining trend that has prevailed since the middle of 2009.Ryan said that securitisation volumes had picked up this year and he was hopeful of renewed growth in the business.Mortgage-servicing revenue increased 46 per cent, to $31.9 million, in 2009/10, but mortgage servicing is a low margin business.Ryan said mortgage servicing was an important complement to the securitisation trustee business. "A lot of the business we have got into with the securitisation trustee business comes from also being able to offer mortgage services," he saidHe conceded that mortgage-servicing revenues were down this year because of weak lending volumes. He said the business needed to increase its scale and improve its margins.