The Golden Butterfly Portfolio: An Independent Backtest

Harry Browne's Permanent Portfolio tilted toward growth with a small-cap value sleeve, tested month by month since Jan 1980 and set beside the other permanent-style allocations. Every figure is net of trading costs and updates each month.

Annual return8.5%since Jan 1980
Max drawdown-17.3%Dec 2021 to Sep 2022
Worst 12 months-15.4%ending Feb 2009
Ulcer Perf. Index1.19return per unit of pain

Data through September 2026. Annual rebalance, trading costs included.

What is in the Golden Butterfly

Five holdings at 20% each. Browne built the Permanent Portfolio for four economic seasons, prosperity, inflation, deflation and recession, with 25% in an asset suited to each. The Golden Butterfly keeps all four and adds a second stock sleeve, tilting the portfolio toward the season that pays: prosperity.

SleeveETFJobWeight
US large-cap stocksVOOProsperity20%
US small-cap valueVBRProsperity, factor tilt20%
Long-term TreasuriesTLTDeflation20%
Short-term TreasuriesSHYRecession20%
GoldSGOLInflation20%

Two changes separate it from Browne's original:

It keeps Browne's long Treasuries, the sleeve that does the heavy lifting in a deflationary crash. It is rebalanced once a year, in January, back to 20% each, and left alone in between.

Performance

Growth of $10,000 (log scale)

Drawdown from previous high

Calendar-year returns

Selected range Jan 1980 to Sep 2026

PortfolioCAGRMax DDUlcerUPISortinoMAR
Golden Butterfly8.5%-17.3%3.571.191.740.49
Permanent Portfolio DMS10.0%-10.9%2.642.192.630.92
Permanent Portfolio7.4%-15.7%3.170.991.890.47
60/409.8%-32.3%6.220.901.670.30
All Weather8.5%-21.1%4.171.031.830.40
Awesome Portfolio7.8%-22.4%3.590.991.730.35
S&P 50012.0%-51.0%12.720.611.300.24

What the record shows

From Jan 1980 through Sep 2026, the Golden Butterfly compounded at 8.5% a year after trading costs. $10,000 invested at the start grew to about $447,695.

That is 1.1 points a year more than Harry Browne's Permanent Portfolio over the same months, and it out-returned the Permanent Portfolio in all 5 decades in the record. The second stock sleeve has added return.

Its deepest decline was 17.3%, from a peak in Dec 2021 to a low in Sep 2022, and it was back to its old high by Mar 2024. That is the third deepest maximum drawdown of the 5 allocations on this page.

Return is only half the picture. The Ulcer Performance Index measures return against the depth and length of drawdowns, and on it the Golden Butterfly scores 1.19, ahead of the Permanent Portfolio at 0.99.

Against a 60/40 portfolio, the yardstick most investors know, it returned 8.5% a year against 9.8%, but with a maximum drawdown of -17.3% against -32.3%. Its Ulcer Performance Index was 1.19 against 0.90.

From Nov 2007 to Feb 2009, through the global financial crisis, the Golden Butterfly returned -14.5%, against -4.2% for the Permanent Portfolio and -32.3% for 60/40. Long Treasuries rallied as stocks fell, which is the job Browne gave them, but with 40% in stocks it still lost more than his original.

The same long Treasuries were the problem in 2022, when rising rates sent them down with stocks. That year the Golden Butterfly returned -12.6%, against -12.2% for the Permanent Portfolio and -15.9% for 60/40.

In the 195 months the S&P 500 fell, the Golden Butterfly still made money in 27% of them.

Since 2000

The modern half of the record, with the dot-com bust, 2008, the long zero-rate decade and the 2022 rate shock all inside it.

Jan 2000 to Sep 2026CAGRMax DDUlcerUPISortinoMAR
Golden Butterfly7.8%-17.3%3.631.631.620.45
Permanent Portfolio DMS8.5%-10.9%3.112.132.220.78
Permanent Portfolio6.7%-15.7%3.341.451.690.43
60/406.6%-32.3%7.620.621.110.20
All Weather6.6%-21.1%4.860.981.400.31
Awesome Portfolio7.2%-22.4%4.211.271.440.32
S&P 5008.1%-51.0%15.890.390.880.16

Return by decade

Annual return1980s1990s2000s2010s2020s*
Golden Butterfly+10.0%+8.9%+7.6%+7.7%+8.1%
Permanent Portfolio DMS+14.7%+9.5%+10.1%+4.3%+12.5%
Permanent Portfolio+9.1%+7.4%+6.4%+6.3%+7.7%
60/40+14.7%+14.0%+2.1%+9.4%+9.4%
All Weather+11.9%+10.3%+6.5%+7.8%+5.1%
Awesome Portfolio+9.3%+7.8%+7.2%+6.7%+8.1%
S&P 500+17.0%+18.1%-1.0%+12.9%+15.3%

* Partial decade, annualized over the months available.

Through the hard stretches

Total return over each period, start of the first month to the end of the last.

PeriodGolden B.PP DMSPermanent60/40All WeatherAwesomeS&P 500
1987 crashSep 1987 to Nov 1987-12.4%+0.4%-6.6%-18.5%-10.2%-8.1%-29.8%
Dot-com bear marketSep 2000 to Sep 2002+2.4%+24.9%-0.5%-23.5%0.0%+3.1%-44.8%
Global financial crisisNov 2007 to Feb 2009-14.5%+5.5%-4.2%-32.3%-7.7%-22.0%-51.0%
COVID crashFeb 2020 to Mar 2020-6.9%+4.4%-1.4%-11.9%-0.6%-8.9%-19.6%
2022 rate shockJan 2022 to Dec 2022-12.6%+2.9%-12.2%-15.9%-18.8%-11.3%-18.2%

How it behaves month to month

Since Jan 1980Worst 12 monthsPositive monthsPositive when S&P 500 fellCorrelation to S&P 500
Golden Butterfly-15.4%65%27%0.77
Permanent Portfolio DMS-9.7%65%43%0.35
Permanent Portfolio-13.9%62%33%0.59
60/40-27.5%66%10%0.97
All Weather-19.5%66%35%0.64
Awesome Portfolio-21.5%64%27%0.73

The portfolios it is compared with

Questions

What is the Golden Butterfly portfolio?

The Golden Butterfly is a five-part, equal-weight allocation: 20% each in US large-cap stocks, US small-cap value stocks, long-term Treasuries, short-term Treasuries and gold. It is a variation on Harry Browne's Permanent Portfolio that adds small-cap value as a second stock sleeve to tilt toward growth.

Who created the Golden Butterfly?

The Golden Butterfly was created by Tyler, the author of the Portfolio Charts website. Dual Momentum Systems is not affiliated with him or with Portfolio Charts. This page is an independent backtest.

What has the Golden Butterfly returned?

In this backtest, from Jan 1980 through Sep 2026, it returned 8.5% a year after trading costs, with a maximum drawdown of -17.3%. These are nominal returns measured monthly. The figures update every month.

Is the Golden Butterfly better than the Permanent Portfolio?

On return, yes: 8.5% a year against 7.4% over the same months. On risk, its maximum drawdown was -17.3% against -15.7%, and its Ulcer Performance Index was 1.19 against 0.99. It holds more stocks, so it tends to earn more in good years and fall a little further in bad ones.

How does the Golden Butterfly compare with a 60/40 portfolio?

Over the same months, the Golden Butterfly returned 8.5% a year with a -17.3% maximum drawdown, while 60/40 returned 9.8% a year with a -32.3% maximum drawdown.

Why are these numbers different from Portfolio Charts?

Portfolio Charts reports inflation-adjusted returns and measures drawdowns from annual data. This page reports nominal returns, measures drawdowns monthly and includes trading costs. Both are correct; they answer different questions.

How often is the Golden Butterfly rebalanced?

Once a year, in January, back to 20% in each of the five holdings. There are no drift bands and no signals in between.

Which ETFs does this backtest use?

VOO for US large-cap stocks, VBR for small-cap value, TLT for long-term Treasuries, SHY for short-term Treasuries and SGOL for gold. These are DMS's choice of fund for each sleeve. Before each fund launched, its history comes from a matching index.

Why these numbers differ from Portfolio Charts

If you have seen the Golden Butterfly's figures on Portfolio Charts, the ones here will look different, and the gap is about measurement, not disagreement.

About the data

All portfolios run on the same monthly return series with the same trading-cost model and are rebalanced as each one specifies. Returns before an ETF's launch come from a matching index, as explained in where the data comes from. The Permanent Portfolio, Golden Butterfly, Awesome Portfolio and All Weather use funds with long, clean index histories. Permanent Portfolio DMS uses recently launched funds whose earlier history relies on hedge fund and managed futures index data, which can be flattered by survivorship and backfill bias, so its early decades deserve extra skepticism.

Backtests are hypothetical and are not a promise of future results. This page is educational and is not investment advice.

Explore it on DualMomentumSystems.com Strategy notes Data through September 2026