with: qe3. very low interest rates. exports have been going well for half a decade now. commodities have started to tank, after been sideways for quite a while. property is only now starting to recover.
you have to put your money somewhere and the sharemarket is the obvious place.
aussie specs did not do well, in this sharemarket season. as such, you can hardly expect them to do well now, now that commodities are tanking.