oaftar, surely you aren't serious with this line of thinking?
How can a tie up between an investment bank and a $40m market cap company generating $15m in revenues and having no surplus capital for regulatory purposes possibly constitute a "5th bank"?
Believe me, I'm no apologist for the major banks, but the benefits to the four incumbents from the recent collapse of Banksia would be thousands of times greater than the adverse effects of Macquarie bank seeking to offer mortgages through YBR's miniscule client base.