Warren Buffett $1 Million Index Fund Bet
Buffett wagered a million dollars on the dullest investment imaginable — a low-cost S&P 500 index fund — against a basket of elite hedge funds. Ten years later, the index fund won in a rout.
Don't have time? Here's what you need to know:
- 1Buffett's 2007 bet pitted an S&P 500 index fund against ~100 hedge funds; over 2008-2017 the index fund won decisively at ~7-8% annualized.
- 2Hedge funds led right after the 2008 crash, but high fees eroded that lead over the full decade.
- 3The lesson is arithmetic: 2-and-20 fees (plus funds-of-funds layering) overwhelm manager skill over a cycle.
- 4Buffett directs most of his own estate into a low-cost S&P 500 fund — capturable with VOO or VTI at ~0.03%.
The Challenge Nobody on Wall Street Took for Years
In 2007, Warren Buffett issued an open challenge: he would bet $1 million that a simple, low-cost S&P 500 index fund would outperform any basket of hedge funds a professional could assemble, over the ten years to come. He was making a public argument that the high fees charged by active managers, hedge funds especially, would swamp whatever skill they brought to the table.
For a while, no one accepted. Eventually Ted Seides of Protégé Partners, a respected fund-of-funds firm, took the other side. Protégé selected five funds-of-funds, which together held stakes in around 100 underlying hedge funds — a broad, professionally curated sample designed to give active management its best shot. The stakes were donated to charity, with the winner directing the proceeds.
How the Decade Played Out
The bet spanned 2008 through 2017 — a stretch that included the financial crisis, a historic crash, and one of the longest bull markets in history. The early going actually favored the hedge funds: in the 2008 collapse, their ability to hold cash and hedge meant they fell less than the plunging index. If the bet had ended in 2009, the hedge funds would have won.
But the index fund's low cost and full market exposure compounded relentlessly through the long recovery. By the end of 2017, the S&P 500 index fund had returned roughly 7-8% annualized, while the basket of hedge funds delivered only a small fraction of that after their fees. Buffett won decisively, and the proceeds — which had grown well beyond the original stakes — went to Girls Inc. of Omaha.
| S&P 500 index fund | Hedge fund basket | |
|---|---|---|
| Period | 2008-2017 | 2008-2017 |
| Early lead (2008 crash) | Fell hard | Fell less — led early |
| Final annualized return | ~7-8% | A small fraction of that |
| Annual cost | ~0.03-0.05% | ~2% + 20% of profits |
| Result | Won | Lost |
Tip: The hedge funds led after the 2008 crash. The lesson isn't that active never wins a year — it's that high fees erode the lead over a full cycle.
The Real Lesson: Fees, Not Forecasting
Buffett's point was never that hedge fund managers lack intelligence — many are brilliant. His point was about arithmetic. As Nobel laureate William Sharpe showed, the average active dollar earns the market return before costs and less than the market after costs, by exactly the amount of its fees. Hedge funds carry the heaviest fees in the industry, often layered further when accessed through funds-of-funds, so the group begins the race carrying a weight that compounds against it every year.
The bet also quietly demonstrated the persistence problem. Protégé chose its funds with expertise, yet expertise in selecting managers was not enough — the winners of one period rarely repeat, and a diversified basket regresses toward the market minus its fees. The takeaway for an ordinary investor is direct: the surest way to capture the market's long-run return is to own the market cheaply and avoid paying for outperformance that, as a group, is unlikely to arrive.
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What It Means for Your Own Portfolio
You do not need a hedge fund, a fund-of-funds, or a star manager to capture what won the bet. A single low-cost S&P 500 fund like VOO, or a total-market fund like VTI, gives you the same broad exposure Buffett backed, at roughly 0.03%. The behavioral discipline — staying invested through the 2008-style crashes rather than fleeing — is what turns that exposure into the long-run return.
The deeper lesson is to stop trying to identify winners in advance. Buffett, one of the greatest active investors who ever lived, advised his own estate to put the bulk of its money in a low-cost S&P 500 index fund. If the man famous for picking stocks recommends indexing for the money he leaves behind, the message for the rest of us is hard to miss: keep costs low, own the market, and let time do the work.
Important: Don't read the bet as a reason to abandon stocks in a crash. The hedge funds' early lead came from sitting out the recovery — exactly the mistake that destroys long-term returns.
Frequently Asked Questions
What was Warren Buffett's index fund bet?
In 2007 Buffett bet $1 million that a low-cost S&P 500 index fund would beat a basket of hedge funds over ten years. Protégé Partners accepted, choosing five funds-of-funds holding roughly 100 hedge funds. Over 2008-2017 the index fund returned about 7-8% annualized and won decisively; the proceeds went to charity.
Did the hedge funds ever lead during the bet?
Yes. During the 2008 financial crisis, the hedge funds' ability to hold cash and hedge meant they fell less than the plunging index, and they led early. But the index fund's low cost and full market exposure compounded through the long recovery, overtaking the hedge funds well before the decade ended.
What's the main lesson of the Buffett bet?
That fees, not forecasting, decide long-run outcomes. By Sharpe's arithmetic, the average active dollar trails the market by its costs, and hedge funds carry the highest fees in the industry — often layered through funds-of-funds. Even an expertly chosen basket couldn't overcome that drag over a full market cycle.
Does Buffett recommend index funds for ordinary investors?
Yes. Buffett has repeatedly recommended low-cost S&P 500 index funds for most investors and instructed that the bulk of the money left to his own family be invested that way. A single fund like VOO or VTI at roughly 0.03% captures the same broad exposure that won his bet.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.