Loss Aversion
The tendency to feel losses about twice as strongly as equivalent gains.
Also called: fear of loss
Written by Javier Sánchez Ros
In plain language
Loss aversion is a well-documented asymmetry: losing $100 hurts roughly twice as much as gaining $100 feels good.
In trading it produces a specific and damaging pattern — cutting winners early to lock in the good feeling, while holding losers to avoid making the loss real.
That behavior directly inverts risk/reward. The average win shrinks and the average loss grows, which can turn a sound strategy negative.
Worked through
Taking +0.4R quickly and letting −1R become −2.6R
- Planned win
- +2.0R
- Actual average win
- +0.4R
- Planned loss
- −1.0R
- Actual average loss
- −2.6R
Both distortions come from the same instinct and they pull in opposite directions. An open profit feels fragile, so it is banked early to make it real. An open loss feels provisional, so it is held, because closing it converts something deniable into something recorded.
The result is a strategy designed around 1:2 being traded at roughly 1:0.15. No rule was formally broken — the stop was moved rather than ignored, the target was taken rather than abandoned — and the expectancy is destroyed from both ends simultaneously.
It is worth being clear that this is not weakness or a character flaw. Losses register roughly twice as strongly as equivalent gains for almost everyone; the feeling is standard equipment. What differs between traders is whether the exits are decided by that feeling or before it arrives.
Which is the entire argument for resting orders. A stop and a target placed at entry cannot be talked out of anything, and they were set by the version of you that had nothing at stake.
Why it matters
Loss aversion attacks expectancy from both directions at once. It is the reason predefined exits exist.
Common mistakes
- Moving a stop further away to avoid realizing a loss.
- Closing a winner at the first sign of a pullback.
- Treating an unrealized loss as somehow less real than a realized one.
Keep exploring
These concepts are connected. Understanding one usually makes the next one easier.
A predefined exit that closes a losing trade before the loss becomes serious.
A predefined price where a winning trade is closed automatically.
The average amount you expect to win or lose per trade over a large sample.
How much you stand to gain compared with how much you stand to lose on a trade.
Seeking out information that supports a position while discounting evidence against it.