The market has a way of exacting a toll on braggarts. Whenever you meet someone at a social function and he starts telling you about his winning trades, you know you are not talking to a professional trader. Professional traders, if they want to tell you about their trading at all, will more likely tell you about their losses (those are often better stories, anyway). Also, remember not to confuse brains with a bull market. That is, if you got lucky in a position because the market moved your way, don’t feel that you are of superior intellect; you might get stung the next time.