The big gains and big risks come from focusing on a few stocks. But that is your optimal number of stocks to invest in (end of day)? I knew a guy who only invested in one at a time..Made a ton of cash (millions) but then lost half of it. I guess it is gamble.....but one that can pay off big IF you are lucky. Personally I invest in 5 at a time. Or I should say I divide my account into 5 and look for opportunities. I have suffered the odd gap down but I take it on the chin. I guess if I was manging OPM I couldn'r be so focused. But it's the only way I get the gains I do. And you?