InvestingBeginner5 min read

The three-fund portfolio

The simplest possible portfolio that almost no professional can beat. Three funds, a ratio, done.

The three-fund portfolio is an investing approach popularized by early Vanguard adopters in the 1990s. The idea: own the entire US stock market, the entire international stock market, and the entire US bond market via three broad index funds. That's it. No stock-picking, no sector tilts, no market timing. Rebalance once a year. Retire rich.

The three funds

Total US Stock Market index fund (e.g. VTSAX, VTI, FSKAX). Owns every publicly traded US company.
Total International Stock Market index fund (e.g. VTIAX, VXUS, FTIHX). Owns developed and emerging markets outside the US.
Total US Bond Market index fund (e.g. VBTLX, BND, FXNAX). Owns a broad slice of investment-grade US bonds.

Typical allocations

Aggressive (age 25–40): 60% US / 30% international / 10% bonds
Moderate (age 40–55): 50% US / 25% international / 25% bonds
Conservative (near retirement): 40% US / 20% international / 40% bonds

Why this works

It's globally diversified (thousands of companies). It has ultra-low fees (usually under 0.1% annually). It requires minimal maintenance. And in any given decade, it beats roughly 85% of actively managed portfolios. It's not exciting, which is part of the point — you're less tempted to mess with it.

When to deviate

Deviate from the three-fund portfolio when you have a specific reason — tax-loss harvesting (direct indexing), concentrated employer stock, specific goals requiring different asset classes, or you genuinely want to tilt toward a factor. Deviating because you read an article saying emerging markets are 'undervalued' is not a reason. Neither is a hot sector trend. The boring version wins.

Put this into practice

Worth tracks your accounts, budgets, and goals — so the concepts in this article aren't just theory.

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