It's now become quite clear how exposed the banks are.
On property mortgages alone, the CBA has 130,000 on defferal , the NAB has ~95,000 on defferal.
So the sums for the CBA if only half default: 65,000x200,000=$13Billion write off.
For NAB a defaulting half would be: 47,500x200,000=$9.5Billion.
As such APRA and ASIC went into Full Wuhan Panic yesterday with this:
APRA, ASIC Update Guidance on Treatment of Deferred Loans. ByEditors, RegulationAsia Published on 14th August 2020 Deferred loans need not be treated as past due or impaired for capital or reporting purposes until after 31 March 2021. New reporting requirements will apply.