Quote from heech:
Mark,
I respect your experience, and I also don't for a second believe my strategy is "dominant" or superior (in the academic sense). So, don't take this as me trying to change your mind.
Why would I believe you were doing that? I didn't try to make you change your mind. This is just a discussion.
But I will say: your comment about the profits being "your money" is exactly the market psychology I'm talking about.
The profits <i>are</i> my money. This is a blind spot for far too many investors.
The position is priced where it is. I have a choice. I can close or I can hold. The fact that I have that choice means it is my money. It's right in front of me. I earned it by taking the risk. To look at it any other way - and I know you will continue to do so because it truly is a blind spot - is ignoring the facts.
If I choose to 'hold' then I am risking money that is in my account. Just the same as if I opened a brand new position today, Except for commissions.
How is it any different? the fact that it's an old position is not relevant. It's a brand new trade every day when I can exit if I want to do so. Thus, it's MY money at risk.
Walk away from this issue for a second, and onto straight equities trading. Why is there so much emphasis on "training" rookies to let their profits run while setting stop losses? Because it's against human nature. Human nature is to be conservative when winning and gambling when losing... despite what the statistics show.
Here's a thought for you: How about this for the answer: Because the people doing the teaching don't know any better.
You buy stock. Your money is at risk. It goes up. Your choice: buy more, sell, or hold. It's a new investment every day and the money - your money - is at risk. the fact that it's a winner means nothing. It's a new decision every day (or minute).
Let winner's run is an acceptable idea - if you use stops to protect your assets.
The crucial corollary is to cut losses. That's the important part and that's the part people cannot easily do.
Why is that crucial: Stocks can run and run. If you cut losses quickly it will never run against you. No big losses. If you use trailing stops on a winner, you can collect when it runs.
But without combining both parts, I think the advice to let 'em run is inadequate.
I still the odds work out, even if once in five years the $1 turns into $10. I still believe the statistics would show holding on for that last $0.05 is usually the right thing to do.
if I had access to the data I would take that bet in a heartbeat. You are also ignoring the mental strain that comes with those losses. That's worth something. peace of mind is valuable. Trading in a comfort zone is intelligent. Closing your eyes to risk maks no sense (to me). Obviously you have a different point of view.
Saving myself from those disappointments makes it more than worthwhile to exit early Sometimes I begin a new trade, and sometimes I sit safely on the sidelines. But I want to exit when I can pay 25 cents for a spread with 6 weeks to go. I'm confident I can use that margin to earn more than 25 cents in another position. And I don't care how FOTM it is. I have my bid in at the opening. Sure I may try 20 cents, but I'll raise it to 25 cents after a short time.
It's like hitting on 16 when the blackjack dealer's showing a face card. It hurts to do it, but it's the "right thing to do".
Not necessarily, assuming you are counting the cards.