OK..Here is a question that nobody has been able to answer. When you read the papers and see an ad that says "20% return last year"..or something like that, it's rather easy to calculate: You start with $100, make $25 at end of 12 months, your ROE or perforamce is 25%. But for many daytraders who do not have any trading capital in their firm there is no "starting capital" to calculate that ROE. So .. how do we calculate our perforamce when someone asks you "What was your performance last year"? I mean, what is our "starting capital"? How can we calculate our ROE?