Munger finished a bachelor’s degree before law school
He studied mathematics at the University of Michigan but left to serve in the war. Harvard Law admitted him without a bachelor’s degree, and he graduated in 1948 with honours
Charlie Munger / Buffett’s Partner and the Architect of Berkshire Hathaway
A lawyer without a bachelor’s degree who turned Warren Buffett from a hunter of cheap stocks into a buyer of wonderful businesses. He thought with models from many disciplines and liked to turn questions upside down to find ways to avoid mistakes. On this page you can try holding his fund through its heavy-loss years, see how a dream business like See’s makes money, and practise spotting the biases that lead to bad trades.
Illustration: a latticework of mental models. No openly licensed photo was found
Munger grew up in Omaha and worked at the Buffett family’s grocery store long before he actually met Warren decades later. He never finished his bachelor’s degree because of the war, but still got into Harvard Law and became a successful lawyer in Los Angeles
The 1950s were very hard for him, bringing a divorce and the loss of a son. After meeting Buffett in 1959 he gradually turned from law to investing. Tap each year to follow his journey
1924 · Born on 1 January 1924 in Omaha. As a teenager he worked at Buffett & Son, the Buffett family’s grocery store, but did not yet know Warren, who was about six and a half years younger
In Berkshire’s 50th anniversary letter, Buffett said Munger persuaded him to change his approach, and called Berkshire built to Charlie’s blueprint, with himself as the general contractor (paraphrased)
Munger in a 2009 BBC interviewIf you can’t calmly accept a 50% fall in your stock, which can happen two or three times a century, you’re not fit to be a shareholder and deserve the mediocre result you’ll get
Paraphrased, not a direct quote
The Wheeler, Munger fund beat the Dow by a mile over 14 years, but the ride was anything but smooth. The figures below are the real annual returns. Choose the year you start investing, and set a rule: if a year loses more than a certain amount, you can’t take it any more and move your money to the Dow instead
The fund’s annual returns before the manager’s share, and the Dow, from the table Buffett published in The Superinvestors of Graham-and-Doddsville (1984). Limited partners compounded about 13.7% a year after the manager’s share. Moving to the Dow is a lab assumption. Taxes and fees are excluded
Even a good trading system has losing streaks. If your order size is so big you can’t stand it, you’ll abandon the system at the worst moment and miss the recovery. The right order size is one where you can still follow your rules even when the account falls hard
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In 1972 See’s made less than $5 million in pre-tax profit and used about $8 million of capital. Buffett and Munger paid $25 million, because the business could grow with almost no extra capital, so nearly all its profit could be sent elsewhere to reinvest. Compare it with businesses that need extra capital every time they grow
A simple model: pre-tax profit grows at a constant rate each year, and the capital needed rises with the extra profit at a set ratio. Taxes and inflation are excluded. Real figures from Buffett’s 2007 letter: See’s made about $82 million pre-tax in 2007 and about $1.35 billion cumulatively since 1972, using only $32 million of extra capital, while an ordinary business earning $82 million would need about $400 million of capital
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In 1995 Munger explained that smart people make bad decisions because of psychological tendencies everyone has, and when several tendencies act together, the effect is more extreme than expected. He called this Lollapalooza. Read each trading situation, then pick the biases you think are at work
Which biases are at work? Pick as many as you like
INVERT · turn it upside down
The tendency names are shortened from the 25 tendencies in The Psychology of Human Misjudgment as printed in Poor Charlie’s Almanack. The situations are hypothetical examples. The answer is the most prominent set of biases, not the only possible answer
Munger used a pilot’s-style checklist before big decisions. Traders can do the same. Before opening an order, ask yourself 3 questions: am I entering because others are? Am I trying to win back a loss? And if I’m wrong, where will I get out?
Munger’s sayings and stories have been shared so widely that some have become distorted. We sort each one by the weight of the evidence
He studied mathematics at the University of Michigan but left to serve in the war. Harvard Law admitted him without a bachelor’s degree, and he graduated in 1948 with honours
Buffett himself wrote in Berkshire’s 50th anniversary letter that Munger persuaded him to stop buying ordinary businesses cheaply and buy wonderful businesses at fair prices, and said Berkshire was built to Charlie’s blueprint
It lost 31.9% and 31.5% two years in a row, a decline of about 53% from the peak, and did worse than the Dow in both years
19.8% is the fund’s total return before the manager’s share. Limited partners compounded about 13.7% a year, still far above the Dow’s roughly 5%
Munger borrowed this advice from Carl Jacobi, a Prussian mathematician, and applied it to decisions, such as asking what would cause failure and then avoiding it
They paid $25 million while the business used about $8 million of capital. Buffett wrote in 2007 that See’s had earned $1.35 billion in cumulative pre-tax profit using only $32 million of extra capital
Munger was the one who pushed Berkshire to invest, but Li Lu, founder of Himalaya Capital, introduced him to the company and its founder Wang Chuanfu
In a 2009 BBC interview he said that if you can’t accept your stock falling 50% two or three times a century, you’re not fit to be a shareholder (paraphrased)
Every lot you trade with XM through 1TRADER earns cash back of up to 90% of the IB commission, lowering your costs over time
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First ask what would blow up your account, such as excessive leverage, no stop loss or trading on emotion, then cut those out. Munger once said something like: all I want to know is where I’m going to die, so I’ll never go there
Munger made his money from a few very good decisions, not frequent trading. Traders don’t need an order every day; a day with no setup is a day you don’t need to trade
Before clicking to open an order, check whether you’re following others, unable to bear a loss, or trusting a famous name without thinking. If several apply at once, be extra careful
Even Munger’s fund fell about 53% in 1973–74. Use an order size you can bear in bad times, or you’ll be forced out at the worst moment
Question 1 / 5
1978, and he held the role until his death in 2023
Such as mathematics, accounting, psychology and economics, so you don’t see every problem through a single tool
$25 million, while the business used about $8 million of capital
31.9% and 31.5%. The portfolio fell about 53% from its peak
A Prussian mathematician who advised solving hard problems by turning them upside down
What you can apply from Munger is preventing big mistakes before thinking about profit, knowing your own biases, and keeping costs low. Here are tools on 1TRADER that can help
Open an account through 1TRADER and get cash back on every lot you trade, lowering your spread and commission costs over time.
How to get rebates, step by step →Leveraged trading carries high risk. Study the broker’s terms and the risk disclosure before opening an account.
An American investor and lawyer (1924–2023), vice chairman of Berkshire Hathaway from 1978 until his death, and Warren Buffett’s partner, who persuaded Berkshire to buy wonderful businesses at fair prices
An idea Munger described in 1994: you should have the key thinking models from many disciplines, such as mathematics, accounting, physics, biology, psychology and economics, and use them together instead of seeing every problem through a single tool
Advice Munger borrowed from the mathematician Carl Jacobi: solve hard problems by turning the question around. For example, instead of asking how to get rich, ask what would blow up your account, then avoid that
Munger’s term for situations where several psychological tendencies act together and reinforce each other, so the result is more extreme than the sum of each one alone, such as fear of missing out, following the crowd and envy in a hot market
Use inversion to set rules that prevent heavy losses, run a bias checklist before opening an order, trade only setups you truly understand, and use an order size that can withstand a losing streak
Educational content, not investment advice. Return figures are publicly reported figures. The labs use models and hypothetical situations. · risk disclosure · Forex glossary