I have made a lot of tactical decisions that historians will look back and say: He shouldn't have done that. He shouldn't have made that decision. And I'll take responsibility for them. I'm human.
It is obvious that the performance of a stock last year or last month is no reason, per se, to either own it or to not own it now. It is obvious that an inability to "get even" in a security that has declined is of no importance. It is obvious that the inner warm glow that results from having held a winner last year is of no importance in making a decision as to whether it belongs in an optimum portfolio this year.
I'm newly widowed, so I've gone from having a life partner, and having another brain to make decisions with, to doing it all on my own and questioning what I'm doing. I have to be a calmer person, because my anger can look pretty terrifying to a young person.