Buffett’s index fund beat a basket of hedge funds
The opponent in Warren Buffett’s decade-long bet was not a single stock picker. It was a collection of funds of hedge funds—investment vehicles that spread money among multiple hedge funds, which in turn make active decisions about what to buy and sell. Buffett backed a low-cost S&P 500 index fund, designed simply to track the performance of large U.S. companies.
The contest ran from 2008 through 2017. By its end, the index fund had gained about 126 percent, while the five hedge-fund portfolios chosen for the challenge had delivered much smaller gains on average. The wager’s proceeds went to charity.
Fees made the hurdle higher
Active managers aim to beat the market by choosing investments they expect to outperform. But research, trading, and layers of fund management cost money. A fund of funds can charge fees on top of the fees charged by the underlying hedge funds. Those costs come out of investors’ returns whether or not the managers succeed.
An index fund takes the opposite approach: it holds investments intended to mirror a market benchmark rather than trying to outguess it. That usually means less trading and lower costs. When both strategies invest in broadly similar markets, an active manager must earn enough extra to overcome the fee gap—and then still outperform the index.
What the bet showed—and what it didn’t
The result illustrated how difficult it can be for expensive, professionally managed portfolios to beat a broad market index over many years. It did not establish that every active manager will underperform, or that an index fund is best for every investor. The lesson was narrower and more practical: beating the market is not enough if fees consume the advantage. For ordinary investors, a simple fund can win not by making brilliant predictions, but by avoiding a costly race to make them.
