Most market participants are at war with their own temperament. The knowledge required to invest well is not primarily technical - it is psychological. Knowing what a discounted cash flow analysis is matters far less than being able to sit still during a 40% drawdown.
Munger’s Latticework
Charlie Munger’s central insight is that wisdom comes from mental models drawn from multiple disciplines, not from specialisation within a single domain. The checklist is not a crutch - it is the operationalisation of the latticework.
Key models for markets:
- Mean reversion (statistics) - extreme outcomes tend to regress
- Incentives (psychology/economics) - follow the incentives, not the stated rationale
- Circle of competence (epistemology) - know what you do not know
- Mr Market (Grahamite psychology) - the market is a voting machine short-term, weighing machine long-term
Keynes on Uncertainty
“The market can remain irrational longer than you can remain solvent.”
The problem is not forecasting - it is the confidence we place in forecasts. Keynes understood that investment is irreducibly about uncertainty, not risk. Risk is quantifiable; uncertainty is not.