I admire and encourage your mathematical diligence.

What I'm worried about is the error bars - multiplying errors can cause wild differences between the estimated and actual numbers. If the error bars of the two funds (CCF and TCF) overlap significantly, it might be too soon to judge which one is best.

Thanks for this interesting post. A request/suggestion: the graph of section 2 in this article could be explained more clearly. Though I read the caption a couple of times, I still don't understand what the scores on the axes mean exactly. If this is a popular post, I'd consider clarifying.