I think stop losses are good in theory, but I find many of our positions aren't liquid enough to execute one at a significant level. Anyway, for me, I find the absolute dollar loss to be more of the focus, as I'm often adding to positions as things develop and it's difficult to define what my percentage gain/loss is, since shares have gone in and out. Generally, if I see a 5 figure loss showing on Ameritrade, I usually get uncomfortable and go somewhat into retreat. It might be a case of going from an aggressive position to an ordinary one. Whiplashes are as much of a factor as the stock fall itself (ATPG can torture me at times), and not giving up completely is one way to help lessen those.