What is Loss aversion?
Zarardan qochish
In short
The psychological tendency to feel a loss more strongly than a gain of the same size. In traders it leads to holding losers and selling winners too early.
Loss aversion is the psychological tendency to feel a loss more strongly than a gain of the same size. According to the research of psychologists Daniel Kahneman and Amos Tversky, people feel a loss roughly twice as strongly as an equal gain. The pain of losing $100 is much stronger than the joy of finding $100.
How it shows up in trading
- Holding losers: realising a loss hurts, so the trader moves the stop-loss or skips it entirely, hoping "it'll come back".
- Selling winners early: the fear of "giving back" profit makes even small gains get grabbed quickly.
- The result: the average loss is larger than the average win, and the account shrinks even with a high win rate.
What helps
- Set the stop and target before entry, and place the order straight away.
- Think in R: −1R is part of the plan, not a defeat.
- Compare average win and average loss in your trading journal.
- Keep risk small: a loss of 0.5–1% of the account is much easier to accept.
You can't eliminate the bias — it's human. The goal is a system where decisions follow rules, not feelings.
Example
A trader's 20 trades (illustrative):
- 12 winners (60%), average gain $150 — sold early.
- 8 losers (40%), average loss $400 — stop moved, "waiting for it to come back".
Average result per trade: 0.6 × $150 − 0.4 × $400 = $90 − $160 = −$70. Over 20 trades: −$1,400.
If the trader kept the stop at $200 and held winners to the planned $300 (even if the win rate dropped to 45%): 0.45 × $300 − 0.55 × $200 = $135 − $110 = +$25 per trade.
Mistakes and tips
Place the stop order with your broker the moment you enter — "I'll set it later" often means never.
Never move a stop in the direction of the loss; only toward profit.
Compare average win and average loss each month: if losses are clearly bigger, this bias is at work.
Frequently asked questions
- Why is it so hard to sell a losing stock?
- Selling makes the loss "real", and the brain tries to avoid that pain. That's why the exit rule has to be set before entry.
- How do you overcome loss aversion?
- You can't fully, but preset stops, small risk and journal statistics greatly reduce its effect.
Learn it in the Academy
This term is covered with hands-on examples and a quiz in these lessons of the interactive course.
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