John C. Bogle

American investor and Vanguard founder who created the first index mutual fund and whose The Little Book of Common Sense Investing remains the definitive case for passive investing.

John C. Bogle founded The Vanguard Group in 1974 and launched the world’s first index mutual fund available to individual investors in 1976. His insight — that costs compound against investor returns just as gains compound in their favor, and that most actively managed funds fail to beat low-cost index funds over time — has been vindicated by decades of data. The Little Book of Common Sense Investing, first published in 2007, is the accessible distillation of a lifetime of thinking about investor returns, market efficiency, and the mathematics of compounding costs.

The book’s argument is simple, well-documented, and frequently uncomfortable for the financial services industry: own the entire stock market through a low-cost index fund, minimize trading, hold for the long term, and ignore market noise. Bogle presents the arithmetic of why this strategy outperforms active management with a clarity that is hard to dismiss. He was not a neutral observer — he built his career on this argument — but the data he marshals is real.

Bogle was also one of finance’s rare genuine moralists. He argued that the investment industry had evolved to serve itself rather than investors, and he did so from inside the industry with uncommon consistency. Some find The Little Book of Common Sense Investing too repetitive — the argument is made several times from slightly different angles — but repetition in this case may serve a purpose: the evidence for index investing is not intellectually difficult, it just requires conviction to follow in practice.