The Whole World’s Markets in Three Low-Cost Funds
The three-fund portfolio is a complete investment plan built from just three low-cost index funds: one holding the total US stock market, one holding international stocks and one holding US bonds. Together they own thousands of companies and bonds across the world, for a fraction of a percent a year.
It is one of the simplest and most widely used long-term strategies there is, and its strength is exactly that simplicity. There is nothing to predict, no fund manager to trust and almost nothing to go wrong, as long as you understand what each fund does and stick to the plan.
This guide shows you how the three-fund portfolio works, how six different versions of it performed year by year from 2012 to 2025, what happens when you never rebalance it, and how to choose the right mix for your own goals.
Start Here: Learn to Build It Properly
Financial Regulation Courses (FRC) is a financial education provider with its roots in regulation and professional training. FRC sells no investments, manages no money and earns no commission on any fund, so its courses teach you how portfolios work without steering you towards any product.
ETF Investing for Beginners teaches you how index ETFs work, what they cost and how to build your first portfolio. ETF Investing Strategies teaches you to plan, build and manage a complete ETF portfolio, and Advanced ETF Investing covers rebalancing, tax placement, risk and complex funds.
FRC’s programs and memberships are open to everyone. Each course can be taken on its own, and interest-free payment plans let you spread the cost over two, three or four months.
How FRC’s Courses Teach Portfolio Building
The three-fund portfolio looks simple on paper, and it is. The difficult part is choosing the right mix for you, keeping it on track for decades and not abandoning it when one of the three funds has a bad year.
ETF Investing for Beginners covers the foundations first: ETF basics, costs, trading and risk, and then choosing and building a first portfolio. Every chapter ends with a 15-question assessment with an 80% pass mark, and the next chapter only unlocks once you pass, so you understand every building block before you put money into it.
ETF Investing Strategies then teaches you how to set an asset allocation and manage a complete portfolio over time. Advanced ETF Investing adds the rebalancing and tax placement decisions that matter more as your portfolio grows.
FRC uses AI teachers to present its video lessons, which sit in the FRC dictionary alongside written explanations, quizzes and flash cards. Every lesson is delivered to the same high standard, every time, instead of depending on whichever instructor happens to be teaching, and every lesson is reviewed by qualified finance and compliance professionals before it is published.
The Three Building Blocks
Each of the three funds has a distinct job. Between them they cover the main parts of the world’s investable markets.
| Fund | What it holds | Its job in the portfolio |
|---|---|---|
| Total US stock market | Thousands of US companies of every size | The main engine of long-term growth |
| Total international stock market | Thousands of companies in developed and emerging markets outside the US | Spreads your stock exposure across the rest of the world |
| Total US bond market | Thousands of US government and investment-grade corporate bonds | Steadies the portfolio and cushions stock market falls |
Because each fund is a broad index fund, you are never betting on a single company, sector or country. You simply own the market and keep the return it delivers, minus a very small fee.
The idea grew out of the low-cost index investing approach championed by Vanguard founder John Bogle. Its appeal has lasted for one reason: it gives ordinary investors broad diversification that once required a professional manager.
Popular Funds Investors Use
Several fund companies offer all three building blocks. The table shows some of the most widely used choices, as either ETFs or index mutual funds.
| Building block | Vanguard ETFs | iShares ETFs | Fidelity index mutual funds |
|---|---|---|---|
| Total US stocks | VTI | ITOT | FSKAX |
| Total international stocks | VXUS | IXUS | FTIHX |
| Total US bonds | BND | AGG | FXNAX |
All of them charge very low fees, typically a small fraction of a percent a year. FRC does not recommend any particular provider, and the right choice often depends on which broker you use and what your 401(k) or IRA offers.
FRC’s guide to Fidelity index funds explains how Fidelity’s main index funds differ from each other.
How Six Three-Fund Portfolios Performed
FRC tested six versions of the three-fund portfolio using actual annual returns for VTI, VXUS and BND from 2012 to 2025, rebalanced back to target every year. The mix is shown as US stocks / international stocks / bonds.
| Mix (US / international / bonds) | $10,000 became | Per year | Worst year (2022) | 2018 | Year-to-year swings | 2026 so far |
|---|---|---|---|---|---|---|
| 70 / 20 / 10 | about $48,900 | 12.0% | −18.2% | −6.5% | 13.0 | +10.2% |
| 60 / 30 / 10 | about $45,000 | 11.3% | −17.8% | −7.5% | 12.8 | +10.0% |
| 50 / 20 / 30 | about $35,900 | 9.5% | −16.9% | −5.5% | 10.9 | +7.8% |
| 48 / 12 / 40 | about $32,700 | 8.8% | −16.5% | −4.3% | 10.0 | +6.7% |
| 42 / 18 / 40 | about $31,100 | 8.4% | −16.3% | −4.8% | 9.9 | +6.6% |
| 28 / 12 / 60 | about $23,600 | 6.3% | −15.3% | −3.3% | 8.1 | +4.3% |
The 2026 figures run to November 2. “Year-to-year swings” is the standard deviation of annual returns, a measure of how bumpy the ride was.
The pattern is clear. More stocks brought higher returns and bigger swings, while more bonds brought a smoother ride and lower returns.
Look closely at 2022, though. Even the 60% bond version fell 15.3%, because rising interest rates hit stocks and bonds at the same time, something that had rarely happened before. Bonds usually cushion a stock market fall, but no mix protects you every single year.
Every version had exactly three losing years out of fourteen: 2015, 2018 and 2022. The bond-heavy versions lost less in each of them, which is precisely what bonds are there to do.
The Three-Fund Portfolio vs the S&P 500
Many investors ask why they should not simply hold an S&P 500 ETF instead. Over the same period, the S&P 500 did better than every three-fund version.
| Portfolio | $10,000 became, 2012 to 2025 | Per year | Worst year (2022) |
|---|---|---|---|
| 100% S&P 500 ETF | about $69,600 | 14.9% | −18.2% |
| Three-fund 70/20/10 | about $48,900 | 12.0% | −18.2% |
| Three-fund 60/30/10 | about $45,000 | 11.3% | −17.8% |
That result comes from one of the strongest periods for US large companies in history, and it will not always repeat. The S&P 500 is also only one country and holds no bonds, so it offers no protection if the US enters a long slump, as it did in the 2000s.
The three-fund portfolio is not designed to win the race in any one period. It is designed so that no single market’s bad decade can sink your plan.
Every Year, Every Version
Averages hide what living with a portfolio actually feels like. The table shows the return of all six versions in every year from 2012 to 2025, shown as US stocks / international stocks / bonds.
| Year | 70/20/10 | 60/30/10 | 50/20/30 | 48/12/40 | 42/18/40 | 28/12/60 |
|---|---|---|---|---|---|---|
| 2012 | +15.7% | +15.9% | +13.1% | +11.7% | +11.8% | +9.2% |
| 2013 | +26.2% | +24.3% | +19.0% | +17.0% | +15.9% | +9.9% |
| 2014 | +8.5% | +6.7% | +7.1% | +7.8% | +6.8% | +6.5% |
| 2015 | −0.5% | −1.0% | −0.5% | −0.1% | −0.4% | −0.1% |
| 2016 | +10.2% | +9.4% | +8.1% | +7.7% | +7.2% | +5.7% |
| 2017 | +20.7% | +21.3% | +17.2% | +14.9% | +15.3% | +11.4% |
| 2018 | −6.5% | −7.5% | −5.5% | −4.3% | −4.8% | −3.3% |
| 2019 | +26.7% | +25.8% | +22.4% | +20.9% | +20.3% | +16.5% |
| 2020 | +17.7% | +16.6% | +14.9% | +14.4% | +13.8% | +11.7% |
| 2021 | +19.6% | +17.9% | +14.0% | +12.6% | +11.6% | +7.1% |
| 2022 | −18.2% | −17.8% | −16.9% | −16.5% | −16.3% | −15.3% |
| 2023 | +22.0% | +21.0% | +17.9% | +16.7% | +16.1% | +12.6% |
| 2024 | +17.8% | +15.9% | +13.3% | +12.6% | +11.5% | +8.1% |
| 2025 | +19.1% | +20.7% | +17.1% | +14.9% | +15.8% | +12.9% |
Notice how the bigger international slice in the 60/30/10 version cost it in 2018 and 2024, when international stocks lagged, then helped in 2017 and 2025, when they led. US stocks led in more of those years, which is why the 60/30/10 version finished behind, but nobody could have known that in advance, and in a decade like the 2000s the roles could easily reverse.
In 2022, an investor with $100,000 in the 60/30/10 version would have watched it fall to about $82,200. Those who held on won back almost all of it in 2023, when the portfolio gained 21.0%, and by the end of 2024 were well above where they started 2022.
That is the real test of any portfolio. The three-fund approach only works if you are still holding it after its worst year, which is why understanding it before you start is so important.
What Happens If You Never Rebalance
Rebalancing means selling a little of whatever has grown and buying more of whatever has lagged, to bring the portfolio back to its target mix. FRC’s guide to portfolio rebalancing explains the idea in full.
To see why it matters, FRC ran the 60/30/10 portfolio from 2012 to 2025 with no rebalancing at all. It grew to about $49,800, more than the rebalanced version, but by the end it held about 80% US stocks, 17% international stocks and less than 3% bonds.
| Version | $10,000 became | US stocks at end | International at end | Bonds at end |
|---|---|---|---|---|
| Rebalanced every year | about $45,000 | 60% | 30% | 10% |
| Never rebalanced | about $49,800 | about 80% | about 17% | under 3% |
The effect is even more striking for a cautious investor. A 48/12/40 portfolio, a classic 60% stocks and 40% bonds mix, left alone from 2012 grew to about $40,700, but by the end of 2025 it held about 79% US stocks, 8% international stocks and 13% bonds, nearly 87% in stocks in total.
The unrebalanced investors earned more only because US stocks had an exceptional run. Their portfolios had quietly become different, much riskier investments than the ones they chose, with far fewer bonds left to cushion the next fall.
Rebalancing is not about squeezing out extra return. It is about making sure the risk you are taking is still the risk you signed up for.
There are three common ways to do it. Some investors rebalance on a fixed date once a year, some rebalance whenever a fund drifts more than about five percentage points from its target, and many simply direct new contributions to whichever fund has fallen below its target, which avoids selling at all.
Investing $500 a Month
Most people build a portfolio gradually rather than all at once. FRC modeled $6,000 a year, the equivalent of $500 a month, added at the start of each year from 2012 to 2025.
| Mix | Total paid in | Value at end of 2025 |
|---|---|---|
| 60 / 30 / 10 | $84,000 | about $203,800 |
| 48 / 12 / 40 | $84,000 | about $165,700 |
In both cases the portfolio grew to around twice what was paid in or more, without the investor ever having to pick a winning stock or time the market. Regular investing, known as dollar-cost averaging, also means buying more shares when prices are low.
Why Include International Stocks?
From 2012 to 2025, US stocks beat international stocks by a wide margin, and many investors now question whether the international fund is worth holding. History shows why most diversified investors keep it.
US stocks have not always led. An investor who put $10,000 into an S&P 500 ETF at its launch in May 2000 still had only about $9,429 at the end of 2009, a full decade with nothing to show for it, a period known as the lost decade.
Leadership also changes without warning. In 2025, international stocks gained about 32.4% while the total US market gained about 17.1%, almost twice as much.
Nobody knows which region will lead over the next twenty years. Owning both means you never have to guess, and you will never be fully exposed to one country’s lost decade.
How to Choose Your Mix
The right mix depends on how long you will invest, how much risk you can live with and when you will need the money. The table shows common starting points by time horizon, not personal advice.
| Time until you need the money | Typical stock share | Typical bond share | How international is often split |
|---|---|---|---|
| 30 years or more | 80% to 90% | 10% to 20% | Around a third of the stock portion |
| 15 to 30 years | 70% to 80% | 20% to 30% | Around a third of the stock portion |
| 5 to 15 years | 50% to 60% | 40% to 50% | A quarter to a third of the stock portion |
| Under 5 years | 30% to 40% | 60% to 70% | A quarter to a third of the stock portion |
A popular rule of thumb is to subtract your age from 110 or 120 to find your stock percentage. A 30-year-old using 110 minus their age would hold about 80% stocks and 20% bonds, while a 60-year-old would hold about 50% of each.
Within the stock portion, many investors put somewhere between 20% and 40% in the international fund. A larger international share follows the world market more closely, while a smaller one leans towards the home market most US investors spend and retire in.
Before you settle on a mix, run the sleep-at-night test. The table shows what each version would have lost in 2022 on a $100,000 portfolio.
| Mix (US / international / bonds) | Loss on $100,000 in 2022 |
|---|---|
| 70 / 20 / 10 | about $18,200 |
| 60 / 30 / 10 | about $17,800 |
| 50 / 20 / 30 | about $16,900 |
| 48 / 12 / 40 | about $16,500 |
| 42 / 18 / 40 | about $16,300 |
| 28 / 12 / 60 | about $15,300 |
If watching a loss of that size would make you sell, your mix is too aggressive for you. 2022 was unusual, because bonds fell too, and in most stock market falls the bond-heavy versions protect far more.
Your risk tolerance matters as much as your timeline. A mix you abandon in a crash will always do worse than a slightly more cautious one you hold through it.
Strengths and Weaknesses
| Strengths | Weaknesses |
|---|---|
| Very low cost, often well under 0.10% a year overall | No protection from a broad market crash; all three funds can fall in the same year |
| Thousands of holdings across the world | You must rebalance it yourself, or it drifts |
| No stock-picking or market timing required | International stocks can lag US stocks for long periods |
| Easy to understand and to stick with | Bonds can lose value when interest rates rise sharply, as in 2022 |
| Works in a 401(k), IRA or taxable account | It will never beat the market, because it is designed to be the market |
Common Mistakes With the Three-Fund Portfolio
The most common mistake is adding funds. Investors start with three, then add an S&P 500 ETF, a growth fund and a dividend fund, until the portfolio is a collection of overlapping funds rather than a plan. FRC’s guide to how many ETFs you should own shows exactly what each extra fund adds, and when it adds nothing.
The second mistake is abandoning a fund after a bad stretch. Investors who sold their international fund after years of lagging US stocks missed its 32% gain in 2025.
The third is never rebalancing, which, as the table above shows, can turn a balanced portfolio into an almost all-stock one. The fourth is choosing a mix that is too aggressive, then selling in panic during a crash like 2022.
Every one of these mistakes comes from the same place: holding a portfolio without fully understanding it. That is exactly the gap a structured course closes.
Variations on the Three-Fund Portfolio
Some investors simplify it further into a two-fund portfolio, such as a total world stock fund plus a bond fund. Others hold a single all-in-one or target-date fund that combines all three and rebalances automatically.
Others build a four-fund portfolio by adding a fourth fund for a specific reason, most often international bonds or inflation-protected Treasury bonds for protection against rising inflation. That can be sensible, as long as the new fund does a job none of the original three already does.
Where to Hold the Three Funds
If you invest across several accounts, you can hold all three funds in each one or split them between accounts. Many investors place bonds in tax-advantaged accounts, such as a 401(k) or IRA, because bond interest is taxed as ordinary income.
Inside a 401(k), you can usually build the portfolio from the plan’s own index funds, which often include a total or S&P 500 US stock fund, an international fund and a bond fund. What matters is the total mix across all your accounts. FRC’s guide to how to build an ETF portfolio explains how to plan across accounts step by step.
Questions People Ask
What is the three-fund portfolio? It is a portfolio made of three broad index funds: total US stocks, total international stocks and total US bonds. It gives worldwide diversification at very low cost.
What is the best three-fund allocation? There is no single best mix. Younger investors with long time horizons often hold more stocks, while those closer to needing the money hold more bonds, and the right choice is the one you can stick with through a crash.
How did the three-fund portfolio perform? From 2012 to 2025, a 60/30/10 mix of VTI, VXUS and BND, rebalanced yearly, turned $10,000 into about $45,000, about 11.3% a year. Its worst year was 2022, at about −17.8%.
Is the three-fund portfolio still good? Its strengths, low cost, wide diversification and simplicity, do not depend on market conditions. It will trail an all-US portfolio when US stocks lead, and beat it when they lag.
What is the 3 ETF portfolio strategy? It is the three-fund portfolio built entirely from ETFs, such as VTI, VXUS and BND. It works the same way as the mutual fund version and can be held at almost any broker.
Is the three-fund portfolio better than the S&P 500? Not always. From 2012 to 2025 the S&P 500 returned more, but it holds only US stocks and no bonds, while the three-fund portfolio spreads risk across the world and smooths the ride.
Can I build a three-fund portfolio with ETFs? Yes. A common combination is VTI, VXUS and BND, and other providers offer equivalent ETFs, such as ITOT, IXUS and AGG.
How often should I rebalance a three-fund portfolio? Many investors rebalance once a year, or whenever a fund drifts more than a few percentage points from its target. Adding new money to whichever fund is below target is another simple way to stay on track.
Is the three-fund portfolio good for beginners? Yes. It is one of the easiest complete portfolios to understand and maintain, which makes it a strong starting point for anyone who wants a long-term plan without constant decisions.
What is the 70/30 rule? It usually means 70% stocks and 30% bonds. In a three-fund portfolio, the 70% stock share is split between the US and international funds.
What is Warren Buffett’s 70/30 rule? Buffett is best known for a different mix. He has said the money left to his wife should go 90% into a very low-cost S&P 500 index fund and 10% into short-term government bonds, a simpler two-fund plan.
Does the three-fund portfolio work outside the US? The principle works anywhere: home stocks, international stocks and bonds. Investors outside the US may use funds domiciled in their own country or in Ireland, which can affect the withholding tax paid on dividends.
The Bottom Line
The three-fund portfolio gives you the whole world’s stock and bond markets in three low-cost funds, with no stock-picking, no market timing and very little maintenance. From 2012 to 2025, every version tested grew steadily, with more stocks bringing higher returns and bigger swings.
Its simplicity is its strength, but only if you choose the right mix, rebalance it and hold it through the bad years. Learn to do exactly that with ETF Investing for Beginners, then manage it with confidence through ETF Investing Strategies and Advanced ETF Investing.
