Neophyte question here: I often see people post about how a stock was down and they dump it when they get back to par for them. Is this more a psychological pitfall of investing vs. a smart move? I mean, if the stock has gone up, why assume the high point is where you purchased it at? Either the reasons behind the move are probably such that it won't hit your purchase price or it will exceed your purchase price. Seems to me picking your purchase price as a selling trigger really makes no sense from a fundamental basis as the conditions are such that it will never get back to your purchase price or likely materially exceed it. Again, I freely admit I am not an investment guru, so interested to see what people think of my analysis.