The Philosophy of the 3-Fund Portfolio: Simplicity and Efficiency
The 3-Fund Portfolio is an investment method popularized by Jack Bogle, founder of the Vanguard giant and father of index investing. Its principle is simple: build a diversified portfolio with only three index funds, allowing access to nearly all global financial markets while minimizing fees and complexity.
Typically, this portfolio consists of:
- A developed world equity fund (around 60-70%)
- An emerging markets equity fund (around 20%)
- A bond fund (around 10-20%) to cushion volatility
This approach is based on geographic and sector diversification, ease of management, and cost reduction (TER often < 0.20%). Jack Bogle emphasized that most investors would do better adopting this type of simple portfolio rather than multiplying costly active or sector funds.
French Version Optimized for PEA: The 3 Key ETFs
In France, investing via a PEA requires selecting eligible ETFs, mainly European. Here is an optimized version of the 3-Fund Portfolio adapted for a French investor wishing to benefit from the tax advantages of the PEA, while complementing with a taxable brokerage account (CTO) when necessary.
| ETF | Type | ISIN | Exposure | TER | Account |
|---|---|---|---|---|---|
| Amundi MSCI World (CW8) | Developed World Equities | FR0010876556 | 70% developed markets (MSCI World) | 0.38% | PEA |
| iShares Core MSCI Emerging Markets IMI (EMIM) | Emerging Markets Equities | IE00BKM4GZ66 | 20% emerging markets | 0.18% | CTO (non-PEA) |
| iShares Core € Govt Bond UCITS ETF (IEAG) | Bonds | IE00B4WXJJ64 | 10% euro government bonds | 0.20% | CTO (non-PEA) |
CW8 is the core of the portfolio: it offers broad exposure to large and mid-cap stocks of developed countries, with a TER of 0.38%. EMIM complements with the growth potential of emerging markets, accessible only via CTO, with a very competitive TER of 0.18%. Finally, IEAG is a euro bond ETF, serving as a buffer during downturns, with a TER of 0.20%.