10 investors who changed how we invest
Choosing ten influential investors means choosing ideas that travelled. This selection weighs their contribution to investment practice, rather than personal wealth. A university endowment, an index fund and a private trading account have different constraints; putting their returns in one league table would hide those differences.
Benjamin Graham made the relationship between price and underlying value a teachable discipline. Read his work with a balance sheet beside you. The useful question is how much room an estimate leaves for mistakes.
Warren Buffett gives readers a long record of capital-allocation decisions through Berkshire Hathaway’s shareholder letters. Follow the reasoning about retained earnings, acquisitions and share repurchases. A celebrated holding, taken out of its original context, teaches much less.
Charlie Munger helped shape Berkshire’s emphasis on business quality. His contribution invites a practical test: would the economics still look attractive if the company stopped expanding? Separate that test from admiration for its management.
John Bogle founded Vanguard and helped bring index investing to individual investors. His contribution also makes fees easier to discuss. Two funds can hold similar companies while leaving investors with different net outcomes.
Peter Lynch managed Fidelity Magellan from 1977 to 1990. His career makes company research approachable, but recognising a product is only the beginning. Ownership still requires checking the business, its finances and the price.
Philip Fisher’s Common Stocks and Uncommon Profits asks readers to examine the durability of growth. A rising sales line deserves questions about customers, competition and the investment needed to sustain it.
John Templeton built a career in international investing. Studying his approach is an invitation to compare markets and valuations beyond familiar names, while accounting for currency and political risk.
George Soros brought attention to the interaction between financial prices and economic behaviour. A rising share price can make financing easier; financing can then change the company. The relationship runs in both directions.
Ray Dalio founded Bridgewater. His work provides a route into thinking about portfolios through economic exposures, including growth, inflation and interest rates, rather than through the number of securities held.
David Swensen led Yale’s endowment investment programme. Its long horizon helped support investments that a household needing cash next year might be unable to hold. Access, liquidity and spending obligations belong in any comparison.
How to read their work
Pick one decision and reconstruct what was knowable at the time. Record the price, available information, alternative uses of capital and possible loss. Keep these notes in an organised workspace; collecting famous quotations quickly becomes a substitute for doing the arithmetic.
A useful exercise is to compare Bogle’s concern with costs and Buffett’s analysis of individual businesses. Both require patience, but the research workload and concentration are different. Decide which assumptions you can actually examine.