In 2007, Warren Buffett wagered $500,000 that a basic S&P 500 index fund would beat a hand-picked basket of hedge funds over ten years.
Final score: index fund up 125.8%. Hedge funds, on average, barely cracked double digits combined.
That single bet says more about what Buffett thinks regular investors should buy than any stock pick he's made in decades.
If you're brand new to comparing fund types, S&P 500 or total market: which fund wins long term lays out core differences. And if cost matters to you (it should), how do index ETFs work breaks down why low fees compound into real money over decades.
What Was Buffett's $1 Million Bet, Exactly?
Back in 2005, Buffett argued professional fund managers, as a group, would underperform an unmanaged S&P 500 index fund over time once fees got factored in.
He put real money behind that claim two years later. Buffett offered $500,000, betting an S&P 500 index fund would beat a portfolio of hedge funds over ten years, net of all fees and costs.
Hedge fund manager Ted Seides of Protégé Partners took that bet, picking five funds-of-funds to represent active management's side.
How Buffett Structured It
Both sides put roughly $320,000 into zero-coupon bonds set to mature at $1 million after ten years. Winner's charity would collect that prize.
Buffett picked Vanguard 500 Index Fund Admiral Shares (VFIAX) — a low-cost S&P 500 fund — to represent his side of bet.
Seides selected five funds-of-funds, never publicly named, representing performance across over a hundred underlying hedge funds combined.
Final Results: It Wasn't Close
Over that decade — January 2008 through December 2017 — Vanguard's S&P 500 fund returned 125.8% total.
Seides' five hedge fund picks returned between 2.8% and 87.7% individually, averaging well below index fund's result.
Difference compounded into millions. Proceeds — over $2 million once Berkshire stock appreciation got factored in — went to Girls Inc. of Omaha, a charity supporting girls' education.
"Performance comes, performance goes. Fees never falter." — Warren Buffett, 2017 Berkshire shareholder letter
So What Mutual Fund Does Buffett Recommend?
This bet wasn't theoretical for Buffett. Same logic shows up directly in his own estate plan.
In his 2013 shareholder letter, Buffett laid out instructions for cash going to a trustee for his wife's benefit after his passing.
His advice: put 10% in short-term government bonds, and 90% into a very low-cost S&P 500 index fund. Vanguard's fund, specifically.
Why 90/10, Not 100% Stocks?
That 10% bond allocation isn't about chasing extra return — it's a buffer.
Short-term government bonds stay stable during market crashes, giving a trustee cash to draw from without selling stocks during a downturn.
For someone living off this money, that buffer matters more than squeezing out an extra percentage point during good years. If you're curious how different risk types factor into a setup like this, types of risks in investment with examples walks through that ground.
Buffett's Direct Quote on Average Investors
During a 2021 shareholder meeting, Buffett addressed why his will leans so heavily on index funds rather than picks from his own company.
He stated plainly: average investors shouldn't try picking individual stocks themselves, and a low-cost S&P 500 index fund gives them a better shot at solid long-term results than hiring expensive managers.
That's coming from someone whose entire career was built on picking individual stocks successfully. Worth sitting with.
What This Looks Like With Real Numbers
Picture a $50,000 inheritance split 90/10 per Buffett's formula: $45,000 into an S&P 500 fund, $5,000 into short-term bonds.
Over a decade tracking historical S&P 500 averages (roughly 10% annually before inflation), that $45,000 portion alone could grow past $115,000 — without anyone touching it or paying a fund manager 1-2% annually to "manage" it.
Compare that to a managed fund charging 1.5% yearly. On $45,000 growing at same rate minus that fee, you'd land closer to $97,000 — a gap exceeding $18,000 from fees alone.
Buffett vs Fund Managers: Quick Comparison
| Approach | 10-Yr Result (Buffett Bet) | Annual Fee | Effort Required | Rating |
|---|---|---|---|---|
| S&P 500 Index Fund (VFIAX/VOO) | +125.8% | ~0.03–0.04% | None — automatic | ⭐⭐⭐⭐⭐ |
| Hedge Fund Average (Protégé picks) | +2.8% to +87.7% | 2%+ plus performance fees | None for investor, but high cost | ⭐⭐ |
| Actively Managed Mutual Fund | Varies, often trails index | 0.5%–1.5%+ | None — automatic | ⭐⭐⭐ |
Numbers speak loudly enough on their own.
Does Buffett's Advice Apply to Smaller Accounts?
His will deals with sums far beyond what a typical reader holds. Logic underneath, though, scales down fine.
$500 invested in an S&P 500 index fund behaves identically — in terms of fees, growth pattern, and zero-effort-required structure — as $500,000.
If you're starting with very little, best stocks for beginners with little money covers how small starting amounts fit into this same philosophy.
"But Buffett Picks Stocks Himself"
Fair point — Berkshire Hathaway's entire existence runs on stock picking, and Buffett's been remarkably good at it for over 60 years.
His own admission: that skill is rare, takes decades to develop, and even he doesn't expect average people — including his own wife — to replicate it.
So advice splits cleanly: if you're a professional spending full-time hours analyzing companies, maybe stock picking works for you. If you're not, low-cost index fund is what Buffett himself bet $500,000 on, and what he's leaving for people he loves most.
Where Does VOO or VFIAX Fit Versus VTSAX?
VFIAX and VOO both track S&P 500 — same 500 companies Buffett's bet used.
VTSAX takes a broader total-market approach, covering thousands more companies beyond that 500. Either fits Buffett's underlying logic: low cost, no active management, broad diversification. If you're deciding between these two paths specifically, can you invest in VTSAX with less than $3,000 covers that exact fork.
A Mistake Buffett's Bet Exposes
Seides' hedge funds weren't run by amateurs. These were experienced managers charging premium fees specifically because they claimed superior skill.
They still lost — badly — to a fund that requires zero ongoing decisions once you buy it.
That's worth remembering anytime someone pitches you on a fund, app, or strategy promising to "beat market" for a fee. Buffett already ran that experiment with $500,000 at stake, and result wasn't close.
How to Start
Open a brokerage account — Vanguard, Fidelity, Schwab all offer S&P 500 index funds or ETFs with minimal fees.
Buy shares of an S&P 500 fund like VOO, VFIAX, or similar low-cost equivalent. Set up automatic monthly contributions if your budget allows.
That's genuinely close to entire process. For broader context on fitting this into your monthly budget, how to budget for beginners helps map where investing contributions sit alongside bills and savings goals.
What This Bet Really Teaches
Not that hedge funds are useless, or that stock picking never works for anyone.
Lesson runs simpler: fees compound against you just as powerfully as returns compound for you, and complexity rarely buys better outcomes for everyday investors.
Buffett — arguably greatest investor alive — looked at every option available to him, including his own company's stock, and chose a boring S&P 500 index fund for people he cares about most.
Buffett's own words in that 2013 letter: he expects this simple approach to outperform what pension funds, institutions, and individual investors typically get from high-fee managers over time.
These connect directly to building on what Buffett's bet teaches:
- Can VOO make you a millionaire?
- SPY vs VOO: why SPY is outperforming VOO
- How to turn $10,000 into $100,000
- Risks of single stock investing
- How much to invest at 18 to become a millionaire
Comments (0)
No comments yet.