Why Do I Cut Winners Early and Hold Losers Too Long?
Cutting winners and holding losers is the one habit that can turn a genuinely accurate trader into a losing one. At a 60% win rate, taking +0.5R and giving losers room to 1.5R produces minus 0.30R a trade. The identical win rate at 1:1 produces plus 0.20R. Accuracy was never the problem.
Can a 60% win rate lose money?
Easily. Expectancy is (win rate × average win) − (loss rate × average
loss), so at 60% accuracy:
| Exit behaviour | Average win | Average loss | Expectancy |
|---|---|---|---|
| Symmetric | +1R | −1R | +0.20R |
| Cut winners only | +0.5R | −1R | −0.10R |
| Cut winners, hold losers | +0.5R | −1.5R | −0.30R |
Three rows, one win rate, and the swing from best to worst is 0.50R a trade. Over 200 trades that is 100R — on a $200 unit, $20,000 — and every one of those trades was the same call, entered at the same price, by a trader who was right 60% of the time throughout.[1][2]
Notice that the middle row already loses money. Cutting winners alone, with losses still properly bounded, is enough to turn a 60% win rate negative.
Why is it so hard to do the opposite?
Because both halves of the habit relieve something immediately, and both costs are deferred:
- Taking the small win converts an uncertain gain into a certain one. The relief is immediate; the missed 1.5R is invisible, because you never see the trade you exited.
- Holding the loser defers a certain loss into an uncertain one. Nothing has to be admitted while the position is open, and "it is not a loss until you close it" is a sentence that survives contact with people who know better.
Both are the same underlying preference — certainty about gains, uncertainty about losses — and it is stable enough to have a name in the literature. You do not out-argue it. You arrange not to face it.
How do you arrange not to face it?
Decide both exits before entry, and record them somewhere the decision survives.
That second clause is the part traders skip. A target written in a notebook while the position is open is not a target; it is an opinion that will be revised by the next tick, and the revision will feel like reading the tape. A target fixed before the fact is a different object. When the trade moves, you are not choosing what to do, you are executing a choice already made.
Does this mean never taking a profit early?
No. Scaling out is a legitimate strategy and some setups genuinely resolve early. The distinction is when the rule was written. "Take half at +1R and trail the rest" decided in advance and applied every time is a strategy with a measurable expectancy. "This one felt toppy" decided while the position is green is a different action taken on the trades that happened to be working, which selectively removes your largest winners — the ones the whole distribution depends on.
The underlying mechanism is prospect theory: outcomes are valued as gains and losses against a reference point, with risk-aversion over gains and risk-seeking over losses.[3] That single asymmetry produces both halves of the behaviour at once — take the sure gain, gamble on the loss coming back.
kappi is a trade recorder: you commit a trade before the fact, it is sealed on your device for a time-capsuled delay you choose, then kappi publishes it on a Merkle-anchored log. The seal is the whole mechanism — once a stop, a target and a thesis are sealed, revising them is no longer a private edit. $15/month, no free tier.
Sources
- Shefrin & Statman, 'The Disposition to Sell Winners Too Early and Ride Losers Too Long', Journal of Finance 40(3), 1985, 777–790 read 2026-08-16
- Odean, 'Are Investors Reluctant to Realize Their Losses?', Journal of Finance 53(5), 1998, 1775–1798 read 2026-08-16
- Kahneman & Tversky, 'Prospect Theory: An Analysis of Decision under Risk', Econometrica 47(2), 1979, 263–291 read 2026-08-16
Frequently asked questions
Can a high win rate still lose money?
Yes. At a 60% win rate, taking +0.5R wins against 1.5R losses gives an expectancy of -0.30R a trade. The same 60% at 1:1 gives +0.20R. Exits decide the sign, not accuracy.
What is the disposition effect?
The tendency to realise gains early and defer losses — preferring certainty about gains and uncertainty about losses. In trading it shows up as small wins and large losses from the same set of entries.
How do I stop taking profits too early?
Decide the exit before entry and record it where it cannot be quietly revised. A target chosen while the position is open is an opinion, and it will be revised by the next few ticks.
Is scaling out the same as cutting winners early?
No, if the rule was written in advance and applies to every trade. Scaling by plan has a measurable expectancy. Exiting because a green position feels toppy selectively truncates your largest winners.