Essentially Bankwest pays circa 1.75% p/a interest on your cash...

Essentially Bankwest pays circa 1.75% p/a interest on your cash account balance each month. CMC helps itself to 1% and leaves you the 0.75% crumb. 

Thanks for the tip on HBRD, I'll look into how that works. Though you also have the $11 minimum broker fee to get into it and again to get out of it, so the short term interest had better be good.

Thanks @FullMoonFever I'll also look into this.