Any Wall Street advertising that does not go into the boring details of methodology is most likely to be pushing past performance.

Rather than engage in the sort of selective retention that so many investors tend to do and pretend mistakes never happened, I prefer to 'own' them. This allows me to learn from them and, with any luck, avoid making the same errors again.

Indeed, eventually, random outcomes all revert to the mean, meaning that streaks eventually end. Understanding this is a key part of intelligent and rational investing.

Barry Ritholtz Quotes