Disposition Effect is selling winners too early and holding losers too long. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0243, within the Decision family. The core principle: selling winners too early and holding losers too long. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
Scientific Definition
Selling winners too early and holding losers too long.
Plain-English Definition
Selling winners too early and holding losers too long.
Feynman Explanation
Realize gains; defer the pain.
Core Principle
Selling winners too early and holding losers too long.
Mechanisms
Pending editorial review.
Selling winners too early and holding losers too long.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Pending editorial review.
Project portfolios suffer the same pattern as stock portfolios.
Inputs (Triggers)
Pending editorial review.
Outputs (Behaviors)
Pending editorial review.
Behavioral Signature
Realize gains; defer the pain.
Examples
- Investors who lock in 10% gains and ride 50% losses to zero.
- Project portfolios suffer the same pattern as stock portfolios.
Pending editorial review.
Original analysis from The Incentives Lab — how this element behaves inside real payoff structures.
Why this element matters to incentive design
Executives usually notice this element only after it has cost something. By then it looks like a one-off. It is not. The mechanism underneath it is straightforward: selling winners too early and holding losers too long. You can recognize it in the field by its signature: realize gains; defer the pain. Every element in the Cognition dimension changes the perceived payoff of an action before the action happens, which is exactly where incentive design has leverage.
How it gets exploited
Left undesigned, project portfolios suffer the same pattern as stock portfolios. It is amplified whenever project portfolios suffer the same pattern as stock portfolios. Inside organizations that shows up as project portfolios suffer the same pattern as stock portfolios. The pattern is the same one Goodhart's Law describes: the measurable proxy attracts the effort, and the purpose behind it quietly loses funding.
How the Lab designs around it
The redesign move is to apply equal-rigor stop-loss discipline to winners and losers. Design against it the way you would design against a known failure mode — assume it will appear, and price the exploit before someone finds it.
Famous Experiments
Pending editorial review.
Design Principles
- Apply equal-rigor stop-loss discipline to winners and losers.
Measurement Approaches
Pending editorial review.
Evidence
Pending editorial review.
Pending editorial review.
The Perverse Incentive Lens™
How this behavior is exploited — and how to redesign around it.
- Apply equal-rigor stop-loss discipline to winners and losers.
Pending editorial review.
Pending editorial review.
Interactive Mini Network
Click any neighbor to re-center the graph and follow the threads of connection.
Knowledge Graph Neighbors
Auto-linked to the rest of the Human Behavior Taxonomy by family, domain, dimension, and shared keywords.
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Evaluations are warped by what came immediately before.
We spend less when holding large bills than small ones — same money, different behavior.
One new possession spirals into a cascade of complementary purchases.
We overweight one aspect of an event when predicting its impact.
One negative trait taints judgment of everything else about a person or company.
Evaluated separately, the smaller-but-complete option beats the larger-but-flawed one.
Goals become the focus, sometimes at the expense of the underlying purpose.
'Free' is a different psychological category — disproportionately attractive.
How will I feel about this in 10 minutes / 10 months / 10 years?
Inattention or forgetfulness caused by low attention, hyperfocus, or distraction.
Where Disposition Effect is cited in the corpus
Essays, field guides, and diagnostics from The Incentives Lab that apply this element.
- EssayGoodhart's Law in the Real World
How measurable proxies capture judgment.
- EssayThe Perverse Incentives Hiding in Your KPIs
Cognitive shortcuts turned into scorecards.
- EssayAI Agents Inherit Your Incentives
How this element propagates into automated systems.
- ReferenceThe Periodic Table of Human Behavior
The full 1,267-element map this page belongs to.
- ReferenceThe incentive glossary
Definitions for every mental model, bias, and fallacy in the corpus.
Questions about Disposition Effect
- What is Disposition Effect?
- Disposition Effect is selling winners too early and holding losers too long. It sits in the Cognition dimension (COG) of the Human Behavior Taxonomy™ as element HBT-COG-0243, within the Decision family. The core principle: selling winners too early and holding losers too long. In incentive terms, it matters because it changes the payoff people perceive before they choose — which means it can be designed for, or exploited.
- What is an example of Disposition Effect?
- Project portfolios suffer the same pattern as stock portfolios. The Incentives Lab catalogs everyday, organizational, and historical instances of this element on its Human Behavior Taxonomy™ page (HBT-COG-0243).
- How is Disposition Effect exploited?
- Project portfolios suffer the same pattern as stock portfolios.
- How do you design around Disposition Effect?
- Apply equal-rigor stop-loss discipline to winners and losers.
- Which behavioral dimension does Disposition Effect belong to?
- Disposition Effect is classified in the Cognition dimension (COG) of the Human Behavior Taxonomy™, family "Decision", class "Mental Model". Its permanent identifier is HBT-COG-0243 and its evidence grade is B.