What causes Australian house prices to fall?
What causes Australian house prices to fall?
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Australian housing downturns are overwhelmingly episodes in which the marginal buyer's financing capacity is constrained. This is either an explicit rate channel (higher mortgage rates reducing borrowing capacity) or an implicit credit channel (prudential rules and bank behaviour tightening the assessment rate or restricting allowable debt).
The 2017–19 correction proved the implicit channel can dominate even when policy rates are unchanged — the RBA explicitly noted this episode was unusual because it was not preceded by rising mortgage rates nor associated with rising unemployment.
The depth and duration of downturns are determined by whether the financing shock is accompanied by a labour-income shock (unemployment rising) and/or a local income/population shock (mining-cycle cities). Without these amplifiers, corrections are typically 5–8% nominal and 12–22 months. With them, corrections deepen to 10–20%+ and recovery stretches to 4–8 years.
Monetary tightening
Higher policy rates reduce borrowing capacity directly. Present in 9 of 13 episodes as primary or secondary cause.
Prudential / credit supply
APRA caps, serviceability buffers, Royal Commission tightening. Can trigger downturns without rate hikes (E12).
Labour market deterioration
Rising unemployment amplifies depth and prolongs recovery. E06: unemployment to 10.8% produced longest recovery.
External financial shocks
GFC-style global credit events. Policy offsets (emergency cuts + FHOG Boost) can materially limit damage.
Local income / population
Mining-cycle cities experience prolonged, city-specific downturns even when national conditions ease. Perth: 6+ years.
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