Subdued growth in revenue from shepherding and reporting on asset-backed and mortgage-backed bonds has growth in profit for the corporate trust division of Perpetual.The pre-tax profit on this business for Perpetual was A$16.8 million over the half year to December 2016, up $200,000 on the prior corresponding period but down $700,000 on the June 2016 half year.Securitisation funds under advice edged up for Perpetual to $431 billion from $427 billion six months ago and from $380 billion a year ago.At a group level, net profit for Perpetual lifted to $66 million from $64.4 million the prior corresponding period but down from $67.6 million in the most recent half.