Jack Bogle

Bogle''s investment philosophy is the simplest on this entire list: buy the whole market, hold it forever, pay as little as possible to do so, and never let a market downturn scare you into selling. He believed individual stock picking and market timing were exercises in humility — the market will humble you.

He also believed that the financial industry had a conflict of interest with its clients: the more complex and expensive the product, the better for the firm and the worse for the investor.

Charlie Munger

Munger's whole thing is mental models. The idea is simple: instead of being an expert in one field, you learn the core concepts from as many different fields as possible — psychology, biology, physics, economics, history — and then use that whole toolkit to think about problems.

He calls it a latticework of mental models. It sounds like a self-help concept.

It's actually how he consistently made better decisions than almost everyone around him. On investing, he pushed Buffett away from his old mentor's approach — which was basically "find dirt-cheap companies and flip them fast" — toward something more durable: find the best businesses in the world and hold them forever.

The key word he uses is moat. A business so dominant that competitors can't touch it.

Think Coca-Cola. He was also deeply influenced by psychology, particularly the ways humans reliably fool themselves.

He gave a famous talk called "The Psychology of Human Misjudgment" listing 25 ways our brains get things wrong. Reading it once will change how you make decisions.

Jack Bogle

Bogle''s core belief was that costs are the enemy of investors. Every dollar paid in management fees, transaction costs, and taxes is a dollar that does not compound.

Over 30 years, a 1% annual fee difference can reduce a portfolio by 25%. He called this the "tyranny of compounding costs." His secondary belief was behavioral: investors are their own worst enemy when they try to time the market or chase performance.

The solution to both problems is the same — buy a low-cost index fund, hold it indefinitely, and ignore the noise.

Charlie Munger

Invert. Always invert.

That's his most famous rule — borrowed from the mathematician Jacobi. Instead of asking "how do I succeed?" ask "what would guarantee failure, and then avoid those things." It sounds obvious.

Almost nobody actually does it. He believes the secret to a good life and good investing is the same: figure out what you want to avoid, avoid it relentlessly, and most good things follow.

On wealth: getting rich isn't the hard part — keeping it is. Most people blow up by using borrowed money, getting greedy at the top, or panicking at the bottom.

Don't do those things. On decisions: only make the big bet when you're very sure.

Be patient for a long time, then move fast when the opportunity is obvious.

Jack Bogle

Bogle was conservative by nature and by philosophy. His famous asset allocation rule — hold your age in bonds — is a rule of thumb for declining risk as you approach retirement.

He was deeply skeptical of leverage, alternatives, and complex products. He was also skeptical of ETFs (despite Vanguard offering them), arguing that the ease of trading them encouraged investors to behave badly — buying high, selling low — in ways that traditional mutual fund investors could not.

Charlie Munger

Munger's approach to risk: don't take risks you don't understand, and don't take risks you don't need to. He kept things simple.

He concentrated into a small number of businesses he understood deeply. He never used borrowed money.

He kept large cash reserves. His view on diversification was almost the opposite of what most financial advisors tell you — he thought spreading money across 50 stocks was an admission that you hadn't done enough homework.

If you've done the work, you concentrate. If you haven't, maybe don't invest at all.

Jack Bogle

Bogle was one of the most underpaid financial firm founders in history, by choice. Because Vanguard''s mutual structure does not enrich its leaders in the way that public companies do, Bogle ended up with approximately $80 million at his death — a fraction of what he would have been worth had Vanguard been structured like BlackRock or Fidelity.

He lived in a modest home in Pennsylvania. He drove ordinary cars.

He had a heart transplant in 1996 and continued working until shortly before his death in 2019 at age 89.

Charlie Munger

Munger lived in the same house in Los Angeles for most of his adult life. He was famously frugal — not in a miserable way, but in a "I genuinely don't care about most things money buys" way.

He flew commercial until fairly recently. He read obsessively.

He described himself as a book with legs. His children joked that he was more interesting to talk to than almost anyone alive, but would only engage on topics he found intellectually stimulating.

He donated massively to education — hundreds of millions to Harvard Law School, the University of Michigan, and other institutions, often with very specific conditions attached. He designed buildings as a hobby and funded their construction himself.

He died at 99 worth around $2.6 billion — extraordinary by any measure, and somehow modest given he sat next to one of the richest men in history for 45 years.

Jack Bogle

The index fund itself is the win. The Vanguard 500 Index Fund, launched in 1976, inspired the passive investing revolution that has saved ordinary investors an estimated $1 trillion in fees compared to actively managed alternatives.

The structural insight — that you cannot consistently beat the market, so don''t try — was empirically verified over decades. By 2019, more money was invested in passive index funds than in active funds in the United States for the first time ever.

That shift is largely Bogle''s legacy.

Charlie Munger

See's Candies. In 1972, Munger convinced a reluctant Buffett to pay what seemed like an expensive price — $25 million — for a California candy company.

Buffett thought it was too much. Munger held firm.

See's has since generated over $2 billion in profit for Berkshire, basically funding dozens of other acquisitions. It also taught Buffett the single most important lesson of his career: paying a fair price for a great business beats getting a cheap price for a mediocre one.

That one deal changed the entire direction of Berkshire Hathaway.

Jack Bogle

The Wellington merger with Thorndike, Doran, Paine & Lewis in 1966 was the admitted mistake of his career. He pushed for the merger to give Wellington growth stock exposure during the Go-Go era.

The combined firm underperformed badly in the bear market of 1973–1974. The board fired Bogle as CEO.

He has called the decision a serious error of judgment. The irony is that being fired is what created the circumstances for Vanguard.

The biggest professional failure of his life became the greatest gift to retail investors in history.

Charlie Munger

Munger is famous for avoiding mistakes more than for making spectacular wins — his whole philosophy is about not doing stupid things. But he's admitted to a few.

He said Berkshire was too slow to move into BYD, China's electric vehicle company, despite knowing it was exceptional for years before they finally bought in. He also held too much Wesco Financial for too long when the money could have been put to better use elsewhere.

His most honest self-criticism: he wished he had moved faster when the evidence was already clear. For a man who spent his career warning others about psychological biases, he wasn't immune to them.

Jack Bogle

Bogle grew up in New Jersey during the Great Depression, in a family that lost most of its money in the crash of 1929. His father struggled, the family moved repeatedly, and Bogle attended Blair Academy on a scholarship.

He won another scholarship to Princeton, where he studied economics and wrote a senior thesis on the mutual fund industry — a thesis that predicted that most actively managed funds would fail to beat the market over time. He was 22.

He was right.

He joined Wellington Management Company in 1951 and rose to CEO. He then made a disastrous acquisition decision in the early 1970s that merged Wellington with a growth-focused firm — a merger that failed and cost Bogle his job.

He was fired in 1974. In response, he filed to create a new kind of investment company — one owned by its own funds and therefore by its fund shareholders, not by outside investors.

Vanguard was born in 1975. The first index fund for retail investors launched in 1976.

Charlie Munger

Charlie Munger grew up in Omaha — same city as Buffett, but they didn't know each other yet. His father was a lawyer.

So was his grandfather. Charlie became one too, but he was clearly more interested in figuring out how the world worked than in courtrooms.

He studied math at the University of Michigan, got drafted into World War II, trained as a meteorologist, and somehow ended up at Harvard Law School without ever finishing an undergraduate degree. Harvard took him anyway.

He graduated in 1948 and moved to California to practice law. He was good at it.

He was also quietly building a real estate business on the side that made him more money than law ever did. He and Buffett met at a dinner in Omaha in 1959.

Munger was 35. Buffett was 28.

By the end of the night, Buffett was trying to convince Munger to go into investing full time. It took about a decade.

Munger ran his own investment partnership from 1962 to 1975 — returned 24% annually while the market did 6.4%. Then he fully merged his career with Buffett's at Berkshire, where he stayed until his death in 2023.

Jack Bogle

Vanguard is the company he built and the enduring legacy. Its mutual ownership structure — unusual in finance — means there are no outside shareholders taking profit.

The funds'' investors own Vanguard. This structure allows Vanguard to continuously lower its fees, because profit flows back to investors rather than to a corporate parent.

Today Vanguard manages over $8 trillion and is the largest issuer of mutual funds in the world.

The Vanguard 500 Index Fund (now VFIAX), launched in 1976, was the first retail index fund available to ordinary investors. It tracks the S&P 500.

It charges 0.04% annually. The average actively managed fund charges over 1%.

That difference, compounded over 30 years, is the difference between a comfortable retirement and a difficult one for millions of people.

Charlie Munger

Munger's main stage was Berkshire Hathaway, where he served as Vice Chairman from 1978 until he died. His role was hard to define on paper — he didn't run a fund or manage a portfolio.

What he actually did was talk to Buffett. That was worth a trillion dollars.

Before Berkshire, he ran his own investment partnership from 1962 to 1975 that crushed the market. He also controlled Wesco Financial, a small insurance and financial company he ran as a personal Berkshire subsidiary from 1973 to 2011, until Berkshire fully absorbed it.

Outside finance, he was obsessed with architecture — he personally designed several buildings, including a dormitory at the University of Michigan that his own architecture school rejected for violating design principles. He funded it anyway.

Jack Bogle

Blair Academy (scholarship), 1947. Princeton University, BA in Economics, 1951.

His Princeton thesis — arguing that mutual funds could not consistently outperform the market and should focus on cost reduction — was the intellectual seed of the index fund. He has said the thesis was one of the most important things he ever wrote, which is unusual praise for a 22-year-old''s college paper.

Charlie Munger

University of Michigan, mathematics — left for World War II without graduating. US Army Air Corps, meteorology training.

Harvard Law School, JD 1948 — admitted without an undergraduate degree, which Harvard is apparently capable of when it wants to be.