Re '87
What evidence do you have that shows it was the stock market crash that caused the price/investor finance increases as opposed to the reintroduction of negative gearing (September 1987) after a 2 year absence? Was there a similar uptick in investor share of housing finance in other countries that experienced the same stock market crash?
Re '02
There was a sharp increase in housing commencements following on from the introduction of the FHOG (developers looking to cash in I imagine), so it's not really surprising to hear that investor finance crept up over the 2 years following:
Is that the extent of you evidence?
Nothing so far but coincidental timing as far as I'm concerned.