Property trust GPT Group has posted a full-year net loss of Aus$3.25bn, compared with a profit of Aus$1.18bn a year earlier.

The company said revenue in the year ended 31 December slumped 75% on year to $470.2m.

GPT has been trying to sell up to $2.5bn in assets in a climate where property values are falling and buyers are scarce.

The Australian