Think of it like this. When you buy a share and it goes up 5c,...

Think of it like this. When you buy a share and it goes up 5c, you have to pay tax on the income. Worst case you've made a 12.5% profit based on yesterday's SP and you will pay an absolute maximum of 48c in the dollar tax on that profit. If you're not happy making a 6% net profit then let me know where the returns are better!

Absolute worst case scenario you've got 2.5c per share in your pocket.