Compounders & Quality
Charlie Munger
Assemble a latticework of mental models and invert every problem; avoid stupidity rather than seek brilliance.
Charlie Munger (1924–2023) was Warren Buffett’s partner and Berkshire Hathaway’s vice-chairman from 1978 - a lawyer who became an investor, ran the Wheeler, Munger & Co. partnership in the 1960s–70s, and later chaired the Daily Journal Corporation. He is worth studying less for a track record than for a way of thinking: multidisciplinary “worldly wisdom,” ferocious intellectual honesty, and a gift for compressing hard ideas into memorable lines. His largest single effect on investing was pushing Buffett away from buying cheap, mediocre businesses toward paying up for wonderful ones.
The method
Multidisciplinary mental models applied to concentrated, long-held positions; inversion (solving problems backwards); ruthless avoidance of stupidity, self-deception, and ruin; deciding by opportunity cost; extreme patience punctuated by a few large, high-conviction bets; and the willingness to say “too hard” and pass.
The record
As Berkshire’s vice-chairman he shared in one of the great compounding records of the era; his earlier Wheeler, Munger partnership compounded at a high rate through the 1960s and early 70s before severe drawdowns in the 1973–74 bear market, then recovered. Treat specific partnership figures with care - they are era-specific, concentrated, and volatile, and the headline numbers are not cleanly comparable across periods.
Where they were wrong
By his own account and the record: extreme concentration produced brutal interim drawdowns (the Wheeler, Munger partnership fell roughly by half in 1973–74 before recovering), the kind of volatility most investors could not survive behaviourally; he could be rigidly opinionated and dismissive of fields he disliked; and some later Daily Journal positions and public calls were mixed. He was candid that avoiding disaster, not brilliance, did most of the work.
Studies
12- Study 01A toolbox of ideasDont read a business with one tool - surround it with the few big ideas from every subject that really touch it.Read this study →
- Study 02Solve it backwardsTurn the question around: dont ask how to win, ask how youd lose - then dont do those things.Read this study →
- Study 03Follow the rewardShow me the incentive and Ill show you the outcome - read how someone is paid before you trust what they believe.Read this study →
- Study 04Compare to your best choiceJudge every option against the best thing you could otherwise do with the money - not against nothing.Read this study →
- Study 05Lollapalooza - when many forces push togetherWhen a move is huge and everyone is rushing in, dont look for one reason - count the pushes, and step back from the stampede.Read this study →
- Study 06The brain traps - how you fool yourselfYour own brain is the trickiest salesman youll ever meet - learn its tricks by name and check yourself before every big decision.Read this study →
- Study 07Sit on your handsOnce you own something truly good, the smartest move is often to sit on your hands and let it grow for years.Read this study →
- Study 08Just avoid the dumb mistakesYou dont need to be brilliant - just keep avoiding dumb mistakes, and skip every question that is too hard to judge.Read this study →
- Study 09How a great shop is builtRead the machine first: ask where the profit really comes from, and whether a self-feeding loop is turning inside the business.Read this study →
- Study 10The easiest person to foolDont collect reasons youre right - go hunting for reasons youre wrong, because the easiest person to fool is yourself.Read this study →
- Study 11Two-track analysis: check the facts and check yourselfBefore any money choice, check both tracks: what do the plain facts say, and what is my hidden mind secretly wanting right now?Read this study →
- Study 12Avoiding envy: run your own raceWhen you feel left behind by someone elses win, that ache is envy - run your own race and measure against your needs, not theirs.Read this study →
Primary sources
full register →Read Charlie Munger in their own words. We reproduce none of it - these are the real things to go to.
Poor Charlie's Almanackbook
A collection of Charlie Munger's speeches and 'worldly wisdom' on mental models and rational decision-making. - available wherever books are sold - please buy the book