About Strategy
An evolution of Harry Browne's Permanent Portfolio that adds a small-cap value tilt for enhanced growth. Five equal 20% slices covering stocks, small-cap value, long bonds, short bonds, and gold.
Performance Metrics (2016-2026)
| CAGR (10-Year) | 8.5% |
| Max Drawdown | -11.0% |
| Sharpe Ratio | 0.68 |
| Volatility (StdDev) | 7.4% |
| Best Year | +18.2% |
| Worst Year | -5.8% |
| Strategy Type | Passive Portfolio |
| Risk Profile | Low |
Asset Allocation
The Golden Butterfly splits capital into five equal 20% allocations: US Total Stock Market (VTI), US Small-Cap Value (VBR) for factor exposure, Long-Term Treasury Bonds (TLT), Short-Term Treasury Bonds (BIL), and Gold (GLD). The small-cap value tilt is the key differentiator from the classic Permanent Portfolio.
Execution Rules
- Allocate 20% to each of five asset classes: total market stocks, small-cap value stocks, long-term bonds, short-term bonds, and gold.
- Rebalance annually or when any asset drifts more than 5% from its target weight.
- The small-cap value tilt captures the value and size premiums documented by Fama and French, enhancing long-term returns without significantly increasing volatility.
ETF Proxies Used in Our Backtest
- Vanguard Total Stock Market ETF (VTI) — 20% broad US equities
- Vanguard Small-Cap Value ETF (VBR) — 20% small-cap value factor
- iShares 20+ Year Treasury Bond ETF (TLT) — 20% long-term bonds
- SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) — 20% short-term bonds
- SPDR Gold Shares (GLD) — 20% gold allocation
Allocation Calculator
Recommended Allocation
Enter performance inputs above to calculate weights.
History & Background of the Golden Butterfly
The Golden Butterfly was created by Tyler of the Portfolio Charts website in the mid-2010s. It emerged from exhaustive analysis of thousands of possible asset allocation combinations, optimized for the best balance of returns, stability, and withdrawal safety. The name "Golden Butterfly" reflects its elegant, symmetrical structure — five equal 20% slices like the five sections of a butterfly's wings.
The key insight behind the Golden Butterfly is that the classic Permanent Portfolio (4x25%) leaves significant returns on the table due to its large cash allocation. By replacing the 25% cash bucket with a split between total market stocks and small-cap value stocks, the Golden Butterfly captures the Fama-French value and size premiums — two of the most robust factors in asset pricing research — while maintaining the same defensive posture through gold and bonds.
In backtesting since the early 1970s, the Golden Butterfly has consistently delivered higher returns than the Permanent Portfolio with only modestly higher volatility. Its max drawdown of -11.0% is larger than PP's -8.2% but dramatically smaller than the -20% to -50% drawdowns experienced by equity-heavy portfolios. This makes it an attractive choice for investors who want PP-like stability with meaningfully better long-term growth.
When to Use Golden Butterfly: Pros & Cons
Strengths
- Best risk-adjusted returns (Sharpe 0.68) among passive strategies in this catalog
- Small-cap value tilt adds academically-backed factor premium
- Low drawdowns (-11.0%) while delivering 8.5% CAGR
- Simple 5-fund structure with annual rebalancing
- Excellent withdrawal safety for early retirement (high Safe Withdrawal Rate)
Limitations
- Small-cap value can underperform for extended periods (2018-2020 growth dominance)
- Gold (20%) produces no income and can be volatile
- More complex than 60/40 (5 funds vs. 2)
- Long-term bonds suffered during 2022 rate hiking cycle
- Less tested than the classic Permanent Portfolio — created in mid-2010s
Ideal for: Investors who love the Permanent Portfolio's stability but want higher returns, early retirees focused on Safe Withdrawal Rates, and anyone who appreciates factor-based investing. Excellent choice for tax-advantaged accounts (IRA/401k) due to the small-cap value tilt.