Three-Fund Portfolio
Quick Definition
A simple portfolio using just three index funds -- U.S. stocks, international stocks, and U.S. bonds -- to achieve broad global diversification.
What Is Three-Fund Portfolio?
Three-Fund Portfolio
The Three-Fund Portfolio (also called the Bogleheads Three-Fund Portfolio) is an elegantly simple investment strategy using just three broad index funds to capture the entire global stock and bond market. It was popularized by followers of Vanguard founder John Bogle.
The Three Funds
| Fund | Example (Vanguard) | Ticker | Expense Ratio | Covers |
|---|---|---|---|---|
| U.S. Total Stock Market | Vanguard Total Stock Market | VTI/VTSAX | 0.03% | 4,000+ U.S. stocks |
| International Stock Market | Vanguard Total International | VXUS/VTIAX | 0.07% | 8,000+ non-U.S. stocks |
| U.S. Total Bond Market | Vanguard Total Bond Market | BND/VBTLX | 0.03% | 10,000+ U.S. bonds |
Sample Allocations by Age
| Investor Profile | U.S. Stocks | Int'l Stocks | Bonds |
|---|---|---|---|
| Aggressive (Age 25-35) | 50% | 30% | 20% |
| Moderate (Age 40-50) | 40% | 20% | 40% |
| Conservative (Age 55-65) | 25% | 15% | 60% |
Why Three Funds Is Enough
- Total market funds already hold thousands of stocks across all sectors and sizes
- Adding more funds often means overlapping holdings and higher complexity
- Lower costs -- three index funds can have a blended expense ratio under 0.05%
- Easier rebalancing -- only three positions to manage
- Tax-efficient -- broad index funds generate minimal capital gains
Example
A 35-year-old investing $50,000:
- $25,000 (50%) in VTI (U.S. stocks)
- $15,000 (30%) in VXUS (international stocks)
- $10,000 (20%) in BND (bonds)
Total annual cost: approximately $20 in fees (0.04% blended)
Key Points
- Simplicity is the greatest advantage -- less to manage means fewer mistakes
- Works in any account type (401k, IRA, taxable)
- Equivalent funds exist at Fidelity, Schwab, and other brokerages
- Outperforms the vast majority of actively managed portfolios over the long term
Why It Matters
The Three-Fund Portfolio proves that sophisticated investing doesn't require complexity. With just three funds, you own virtually every publicly traded stock and bond in the world.
Three-Fund Portfolio Example
- 1A three-fund portfolio of VTI, VXUS, and BND gives you exposure to over 20,000 stocks and bonds worldwide.
- 2The investor simplified their 12-fund portfolio into just three total market index funds, saving 0.5% in annual fees.
Related Terms
Index Fund
A mutual fund or ETF designed to track the performance of a specific market index by holding the same securities in the same proportions.
Exchange-Traded Fund (ETF)
A basket of securities that trades on an exchange like a stock, offering diversification with the flexibility of intraday trading.
Diversification
Spreading investments across various assets, sectors, and geographies to reduce risk without sacrificing expected returns.
Expense Ratio
The annual fee charged by a fund as a percentage of assets under management, covering operating costs like management, administration, and marketing.
Asset Allocation
The process of dividing investments among different asset classes like stocks, bonds, and cash to balance risk and reward.
Rebalancing
The process of realigning portfolio weights by buying or selling assets to maintain the original desired asset allocation.
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