@Patrick, could you show me how it all works out with Magash and similar with borrowed money?
He was able to buy R1 619 789,75 worth of ACL, where he should have been able to buy R966 997,82 worth of it (just that total minus his -R652k).
Now ACL is up 8.16%, so he's made R132 174,84 profit. Whereas he should have only been able to make R78 907,02. Thats a gain of R53k for nothing.
So when you say it'll all even out when he sells, how are you taking into account that R53k extra? Its an error of 7.6% on his % growth stat.