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Warren Buffett tells most people to skip picking stocks and just buy an index fund — here's exactly why, and how.
Warren Buffett — arguably the greatest investor alive — tells most people to skip picking stocks and just buy an index fund. Here's exactly why, and how.
An index fund is a type of investment fund that simply tracks a market index — like the S&P 500. Instead of having a manager try to pick winning stocks, it buys everything in the index automatically and holds it.
If the S&P 500 goes up 12% this year, your S&P 500 index fund goes up ~12% (minus a tiny fee). If it drops 10%, yours drops ~10%. You get exactly what the market gives — no more, no less.
In 2007, Warren Buffett bet $1 million that a simple S&P 500 index fund would beat a portfolio of hedge funds over 10 years. He won. The index fund returned 125.8%. The hedge funds averaged 36.3% — and charged 10-20x more in fees.
| Actively Managed | Index Fund | |
|---|---|---|
| Management style | Human fund managers pick stocks | Tracks a market index automatically |
| Expense ratio (avg) | 0.50%-1.50% per year | 0.03%-0.20% per year |
| Performance | ~85% underperform index over 15 years | Matches the market by design |
| Tax efficiency | Lower — frequent trading creates events | Higher — minimal trading |
| Minimum investment | Varies ($1,000-$3,000 common) | $0-$1 (many brokers) |
| Transparency | Holdings disclosed quarterly | Holdings known daily |
An expense ratio is the annual fee deducted from your fund — automatically, invisibly. A 1% fee sounds small. Over decades, it's catastrophic.
| Scenario (30 years, 8% return) | At 0.03% Expense Ratio | At 1.00% Expense Ratio | Lost to Fees |
|---|---|---|---|
| $10,000 invested | $93,020 | $74,350 | $18,670 |
| $50,000 invested | $465,100 | $371,750 | $93,350 |
| $500/month invested | $671,940 | $549,320 | $122,620 |
Both can track the same index. The difference is mostly about how they trade. For most people, it doesn't matter much — just pick the one available in your account.
| ETF | Index Mutual Fund | |
|---|---|---|
| Trades like | A stock — any time market is open | End of day only (NAV) |
| Minimum investment | Price of 1 share (often $1 with fractional) | Often $1,000-$3,000 |
| Tax efficiency | Slightly higher | Slightly lower |
| Auto-invest | Depends on broker | Easy — set and forget |
| Expense ratios | Comparable — both can be very low | Comparable — both can be very low |
| Best for | Flexibility, brokerage accounts | Automatic investing in 401(k) |
Each index fund has a unique ticker symbol used to search and buy it on any brokerage platform. Not financial advice — these are widely discussed funds; always do your own research.
| Ticker | Fund | Tracks | Expense | Note |
|---|---|---|---|---|
| VOO | Vanguard S&P 500 ETF | S&P 500 (500 largest US companies) | 0.03% | Most popular index fund |
| VTI | Vanguard Total Stock Market ETF | Entire US stock market (~4,000 stocks) | 0.03% | Broadest US exposure |
| FZROX | Fidelity Zero Total Market | US total market | 0.00% | Zero expense ratio |
| FXAIX | Fidelity 500 Index Fund | S&P 500 | 0.015% | Great for Fidelity 401(k) |
| VXUS | Vanguard Total Intl Stock ETF | International stocks ex-US | 0.07% | Add for global diversification |
| BND | Vanguard Total Bond Market ETF | US bonds | 0.03% | Add bonds as you near retirement |
Key Takeaway: A simple S&P 500 index fund outperforms ~85% of actively managed funds over 15 years — and charges a fraction of the fee. Expense ratios matter enormously over time; a 1% fee difference on a long-term portfolio can cost six figures. VOO, VTI, or FXAIX are all excellent starting points — pick one and stay consistent, since the fund matters far less than starting. Don't overthink which fund to pick — VOO vs VTI vs FXAIX makes minimal difference over 30 years. The decision that actually matters is starting.
An index fund is a type of investment fund that tracks a market index — like the S&P 500 — automatically, without a human manager picking stocks. ETFs are index funds that trade on a stock exchange like a regular stock throughout the day. Both give you instant diversification across hundreds of companies with very low fees, as low as 0.03% per year.
Index funds don't pay a fixed interest rate like a bank savings account or bond. Instead, they earn returns through stock price appreciation and dividends from the companies in the index. Historically, the S&P 500 has averaged ~10% annual return (7-8% after inflation), though this varies year to year and is never guaranteed.
The most widely held include VOO, VTI, FXAIX, FZROX, SPY, IVV, and VXUS for global exposure outside the US.
Both can track the exact same index and deliver nearly identical long-term returns. The key difference is how they trade: ETFs trade like stocks throughout the day, while index mutual funds are priced once at the end of the trading day. ETFs are slightly more tax-efficient in taxable accounts; mutual funds are easier to set up for automatic monthly investing.
You can start with as little as $1. Many brokers like Fidelity, Schwab, and Robinhood offer fractional shares, and Fidelity's FZROX and FSKAX mutual funds have a $0 minimum investment. There's no ideal amount to start — starting small and consistently is far better than waiting.
US-listed ETFs like VOO, VTI, and SPY are generally only available to US residents through US brokers due to regulatory restrictions. International investors can access similar funds through UCITS-compliant ETFs listed in Europe or through their local brokerage's equivalent products.
Disclaimer: This article is for general educational purposes only and does not constitute personalized financial, investment, tax, or legal advice. Figures, rates, and rules mentioned may change over time — verify current details with an official source or a qualified professional before making financial decisions.