Australia's banks could handle a housing price fall of 40% and an 8% home loan default rate, according to preliminary results from Fitch Ratings' stress tests.

The ratings agency found banks would endure a maximum $10bn in losses in the third year of a severe housing crash and mortgage insurers would lose about $7bn.

Fitch began the stress tests in response to questions about the sustainability of Australia’s housing market and its ability to weather a fall out.

John Miles, director for financial institutions at Fitch, told members at a briefing in Sydney yesterday that “losses, even in the most severe scenario, are manageable”.

Fitch tested three scenarios – mild stress with mortgage defaults of 2.5% and 20% drop in home prices; medium stress with 6% defaults and 30% decline in prices; and severe stress with 8% defaults and a 40% price slump