Real estate group McGrath's shares have been hammered after it admitted the loss of more than 10 per cent of agents from its company-owned offices will weigh on its full-year earnings.

McGrath, which has not yet given guidance for full-year earnings, on Monday said it expected weak second-half results would fail to meet current estimates put out by analysts. The beleaguered real estate group on Monday said Bell Potter analysts had put out a forecast for full-year earnings of $20.9 million,…