Three-Fund Portfolio (Bogleheads)
Created by Bogleheads community (inspired by John C. Bogle)
The simplest globally diversified index portfolio you can build with three funds.
What is it?
The Three-Fund Portfolio is the flagship strategy of the Bogleheads community, a group of investors inspired by Vanguard founder John C. Bogle's philosophy of low-cost index investing. It holds exactly three funds: a total US stock market index, a total international stock market index, and a total US bond market index, in this example weighted 40/20/40.
The philosophy
Bogle's central argument was that most investors, including professionals, cannot reliably beat the market after costs, so the rational strategy is to capture the entire market's return as cheaply as possible rather than try to pick winning stocks, sectors, or managers. The Three-Fund Portfolio operationalizes this idea in its purest form: own essentially every publicly traded company in the US and abroad, plus a broad slice of investment-grade bonds, and let the market's long-run growth do the work while expenses and trading are kept to a minimum.
How it works
The US total market sleeve owns thousands of domestic companies across all sizes and sectors in market-cap-weighted proportion, so it automatically tilts toward whichever companies are currently largest without requiring any active decisions. The international sleeve extends the same total-market logic outside the US, adding developed and emerging market exposure and reducing single-country risk. The bond sleeve dampens volatility and provides a stable income stream, with its weight typically increased for more conservative investors and decreased for more aggressive ones — the 40/20/40 split shown here represents a moderate version of the approach.
Who is it for?
This portfolio is built for investors who want maximum diversification and minimum complexity, are comfortable accepting the market's return rather than trying to beat it, and prefer to set their stock/bond ratio once based on their own risk tolerance and time horizon rather than following someone else's fixed formula. It is especially popular with younger, long-horizon investors who adjust the stock/bond mix over time as they approach a goal such as retirement.
Key strengths & trade-offs
Its greatest strength is transparent, low-cost, maximally diversified market exposure that is trivially easy to maintain and explain. Because the ratios are flexible by design, it is also easy to adapt to different risk tolerances simply by changing the stock/bond split. The main trade-off is that it holds no dedicated allocation to gold, commodities, or real estate, so it offers less protection against inflation shocks or scenarios where stocks and bonds move together, and its performance is entirely a function of whatever stock/bond ratio the investor chooses.
Risk Level
Rebalancing
annual
Number of Assets
3
Best For
Long-term investors wanting a smoother ride than all-equity
Current Allocation
| US Total Market | 40% |
| Total International | 20% |
| US Total Bond Market | 40% |
Performance: 29.8-Year Backtest
Data for Total International starts 1996. Simulation covers 29.8 years.
$10,000 initial investment → $56,993
Annual Returns
| Strategy | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Three-Fund Portfolio (Bogleheads) | -2.1% | +14.6% | +11.7% | +11.2% | +1.7% | -0.9% | -7.0% | +3.9% | +6.2% | +4.3% | +5.7% | +0.3% | -23.0% | +26.0% | +15.1% | +2.5% | +10.0% | +10.7% | +8.2% | -3.2% | +12.0% | +16.9% | -2.6% | +13.8% | +13.1% | +7.5% | -7.9% | +9.3% | +13.5% | +15.7% | +5.1% |
Key Metrics
ETFs in This Strategy
Based on historical data. Past performance does not guarantee future results. This site is for educational purposes only and does not constitute investment advice.