<prompt> Human: I just sold half of my stake in a stock that reached 100. This took the principal off the table so that the only thing left is profit. But since then, the stock continues to go up, and I get this nagging feeling mostly from my wife, that if I had only held on longer I would have locked in more gains. Can successful people turn off this would have, should have part of their brain? I made a sizable profit...shouldnt that be enough to feel satisfied in the investment? Any tips would be welcome.  <response>: Buy The Intelligent InvestorAny time the market makes you feel fearful or greedy, dont take any action.If your wife is playing captain hindsight and nagging you about money you could have made, dont go out of your way to discuss your investments with her. She will amplify your feargreed emotions and the problem will get worse. 