Munger’s Tendencies
Munger’s catalogue of 25 psychological tendencies that systematically distort judgement — and how to guard against them.
Author
Charlie Munger
Model type
About
Charlie Munger synthesised classic findings from psychology into a practical list for investors and operators. The core idea: incentives, social dynamics, and cognition interact; severe errors often arise when several tendencies stack into a lollapalooza effect.
Why a list, not a graphic for each? The tendencies don’t form a neat taxonomy and frequently compound. A clear list supports scanning, pre-mortems, and auditing decisions.
How it works
Reward- and punishment-superresponse – behaviour follows incentives; expect gaming.
Liking/Loving – we overrate those we like; halo effects.
Disliking/Hating – we underrate those we dislike; horn effects.
Doubt-avoidance – premature closure under uncertainty.
Inconsistency-avoidance – stick with prior commitments to look consistent.
Curiosity – tendency to seek/attend to novel information.
Kantian fairness – bias toward perceived fairness norms.
Envy/Jealousy – relative position distorts choices.
Reciprocation – urge to return favours, even when maladaptive.
Influence-from-mere-association – adjacent cues colour judgement.
Simple, pain-avoiding psychological denial – reject hard truths.
Excessive self-regard – overconfidence, self-serving attributions.
Overoptimism – base-rate neglect, planning fallacy.
Deprival-superreaction – losses loom larger than gains.
Social proof – follow the crowd, especially under ambiguity.
Contrast-misreaction – evaluations depend on nearby anchors.
Stress-influence – pressure narrows attention and impairs judgement.
Availability-misweighing – vivid/recent beats relevant/base rate.
Use-it-or-lose-it – skills and circuits atrophy without use.
Drug-misinfluence – chemistry alters preferences and risk perception.
Senescence-misinfluence – ageing changes cognition and incentives.
Authority-misinfluence – deference to perceived experts or rank.
Twaddle – love of narrative and jargon over substance.
Reason-respecting – compliance when given “reasons,” even weak ones.
Lollapalooza – multiple tendencies combine to produce extreme outcomes.
Use-cases
Decision pre-mortems: scan for stacked tendencies before sign-off.
Deal and board papers: include a “bias audit” sidebar with concrete mitigations.
Sales/comp design: test incentives for gaming and unintended behaviours.
Post-mortems: classify misses by dominant tendencies; update playbooks.
Step-by-step
Define the decision and the actors at risk of bias.
Run the checklist; mark any stacking (2+ tendencies on the same choice).
Design countermeasures: base-rate tables, independent checks, incentive tests, written pre-commitments.
Record the bias audit with the decision memo; review in post-mortems.
Pitfalls & Cautions
n/a – understanding these tendencies is the cure to many cognitive pitfalls. That was Charlie Munger’s point
Related Mental Models
Click below to learn other mental models
Perceptual Bias
When perception systematically deviates—illusions, context effects—so the same data looks different.
Framing Effect
Choices shift with wording. The same facts, framed differently, lead to different decisions.
Man with a Hammer Syndrome
Over‑applying a favourite tool (“to a man with a hammer, everything looks like a nail”).
