By Thomas Ferrière and Laure Frey
Household mortgage debt can jeopardise financial stability, as the 2008 crisis showed. This risk is often assessed using the ratio of the loan amount to the value of the financed property, or loan-to-value ratio (LTV). Yet, very high LTVs cover in large part the property purchases, excluding primary residences, of households with the highest incomes, which are not necessarily the most risky. Therefore, this ratio by itself is insufficient to provide the full picture.