Via Bloxo comes his housing risk case with five possible triggers for a price crash:
One possible driver could be a further tightening of credit availability, possibly in response to recommendations from the banking Royal Commission, which are due to be announced in early 2019,…there is considerable uncertainty on this issue.
Another possibility is a squeeze on household incomes as interest-only loans convert to principal and interest loans over the coming period. This reflects that a high share of new loans in 2016 and 2017 were issued on interest-only terms, but that these loans are due to automatically reset to principal and interest loans over the coming years. Importantly, some of this has already occurred, with the share of housing loans with interest-only terms falling from 40% of the national total to 27% over the past year or so.