Some investors may outperform the market, but it has never been proven this is because of skill rather than simple luck. This is similar to a situation where t

Some investors may outperform the market, but it has never been proven this is because of skill rather than simple luck. This is similar to a situation where thousands of 'investors' bet on a pseudo-random outcome such as flips of the coin or rolls of dice; an observer would expect that some will win big, and some will lose their entire 'investment', but it is not due to ability or strategy.