Mental Models


“You've got to have models in your head. And you've got to array your experience—both vicarious and direct—on this latticework of models.” - Charlie Munger

Psychological Tendencies to Guard Against In Investing

“The first principle is that you must not fool yourself and you are the easiest person to fool” -Richard Feynman   Do Something Bias, Social Proof and Confirmation Bias… Let’s walk through a theoretical situation where these three powerful Biases can destroy someone in the field of investing: A new Investment Manager named Benjamin just…...

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The Punch Card Mindset

“I could improve your ultimate financial welfare by giving you a ticket with only twenty slots in it so that you had twenty punches–representing all the investments that you got to make in a lifetime.  And once you’d punched through the card, you couldn’t make any more investments at all.  Under those rules, you’d really […]

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Geoff’s Mental Model #1: “Market Power”

“The single most important decision in evaluating a business is pricing power. If you’ve got the power to raise prices without losing business to a competitor, you’ve got a very good business. And if you have to have a prayer session before raising the price by 10 percent, then you’ve got a terrible business.” – Warren…...

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