Not sure if this is what you're asking, but if fund returns are random but different, then someone is going to have the best performing fund. Let's say the bes

Not sure if this is what you're asking, but if fund returns are random but different, then someone is going to have the best performing fund. Let's say the best performing fund is (fictional) Xanadu Investments we'd ask, how do we explain Xanadu's performance.