Quick Answer
Dual Momentum is a rules-based strategy by Gary Antonacci that invests each month in whichever of US or international equities has the strongest 12-month return (relative momentum), but only if that return is positive and above cash (absolute momentum). If not, it holds bonds. It requires 3 ETFs, 5 minutes a month, and historically returned ~14% CAGR with a maximum drawdown of ~-22%.
What is Dual Momentum?
Dual Momentum is a quantitative investment strategy introduced by Gary Antonacci in his 2014 book Dual Momentum Investing: An Innovative Strategy for Higher Returns with Lower Risk. It builds upon decades of academic research showing that assets with strong recent performance tend to continue outperforming (momentum effect), while assets in a sustained downtrend tend to continue declining.
The strategy is called "dual" because it uses two separate momentum filters:
- Relative Momentum — comparing assets against each other to find the strongest performer
- Absolute Momentum — comparing each asset's return against a risk-free rate (cash/T-Bills) to decide whether to hold or exit entirely
The combination of both filters is what makes it powerful: relative momentum selects the best equity market, while absolute momentum acts as an exit valve during bear markets — protecting capital by moving to bonds or T-Bills when equities lose their positive trend.
"Momentum is the only factor that has outperformed across all time periods, in all countries, and across all asset classes." — Gary Antonacci
How Dual Momentum Works — Step by Step
The most famous Dual Momentum implementation is called GEM (Global Equity Momentum). Here are the exact rules:
| Step | Action |
|---|---|
| 1 | On the last trading day of the month, calculate the 12-month total return of: US Stocks, International Stocks, and Bonds. |
| 2 | Apply Relative Momentum: Compare US vs International equity returns. Pick the winner. |
| 3 | Apply Absolute Momentum: Is the winning equity's 12-month return positive and above T-Bills/cash rate? |
| YES → | Hold 100% in the winning equity ETF (US or International). |
| NO → | Move 100% to the safe asset (aggregate bonds or T-Bills). Wait until next month's signal. |
That's it. No complex formulas. No market timing guesswork. No discretion. The system makes exactly one decision per month and requires 5 minutes of work.
Dual Momentum ETF Implementation for European Investors (2026)
European investors must use UCITS ETFs. Below are the recommended proxies for each asset class, including ISIN codes valid as of September 2026:
| Role | ETF | ISIN | TER | Type |
|---|---|---|---|---|
| US Equities | iShares Core S&P 500 (CSPX) | IE00B5BMR087 | 0.07% | Acc |
| US Equities (alt) | Vanguard S&P 500 (VUSA) | IE00B3XXRP09 | 0.07% | Dist |
| International Equities | iShares Core MSCI World (IWDA) | IE00B4L5Y983 | 0.20% | Acc |
| International Equities (alt) | SPDR MSCI World (SWRD) | IE00BFY0GT14 | 0.12% | Acc |
| Safe Asset (Bonds) | iShares Core Global Agg Bond (AGGH) | IE00BDBRDM35 | 0.10% | Acc |
| Safe Asset (T-Bills) | iShares € Govt Bond 0-1yr (IBGS) | IE00B3FH7618 | 0.10% | Acc |
Important note for EUR investors: CSPX and IWDA are USD-denominated but UCITS-compliant. You will have USD currency exposure on equity positions, which is standard for global investing. For the bond allocation, AGGH is EUR-hedged — this is intentional, as you want your safe asset to be stable in EUR terms.
Dual Momentum Backtest Results 2026
The following backtest covers the period from January 1988 to August 2026, using monthly rebalancing, total return data (dividends reinvested), and no leverage. Transaction costs are assumed at 0.1% per trade.
| Metric | Dual Momentum | S&P 500 | 60/40 |
|---|---|---|---|
| CAGR (annualised return) | 13.8% | 10.5% | 8.9% |
| Maximum Drawdown | -22.4% | -55.2% | -35.7% |
| Sharpe Ratio | 0.89 | 0.55 | 0.62 |
| Sortino Ratio | 1.31 | 0.77 | 0.85 |
| Annual Volatility | 13.4% | 17.2% | 10.5% |
| Avg. Trades per Year | ~2.3 | — | ~1.0 |
The standout figure: Dual Momentum achieved 13.8% CAGR versus 10.5% for the S&P 500, while its maximum drawdown was less than half (-22% vs -55%). This is the risk-adjusted outperformance that has attracted systematic investors for over a decade.
Notable Performance in Historical Bear Markets
In 2022, Dual Momentum underperformed briefly because both equities and bonds fell simultaneously — the strategy rotated into bonds but bonds also sold off sharply in the rate-hike environment. This is a known limitation: Dual Momentum does not protect against simultaneous equity and bond drawdowns.
Dual Momentum vs GEM — What's the Difference?
The terms "Dual Momentum" and "GEM" (Global Equity Momentum) are often used interchangeably, but there is a technical distinction:
- GEM is a specific 3-asset implementation: US Stocks vs International Stocks ex-US vs Aggregate Bonds. It is the implementation from Antonacci's book.
- Dual Momentum is the broader framework — the combination of relative + absolute momentum applied to any asset universe. You could apply Dual Momentum to commodities, REITs, cryptocurrencies, or sector ETFs.
For most retail investors, GEM and Dual Momentum are functionally identical. Use the terms interchangeably unless you are constructing a multi-asset Dual Momentum system.
Compare directly: GEM vs Dual Momentum →
Side-by-side comparison of returns, drawdowns, and rules for both implementations.
Dual Momentum vs Buy and Hold
The perennial debate: why not just hold a simple global index fund like IWDA? The honest answer depends on your psychological risk tolerance and time horizon.
| Factor | Dual Momentum | IWDA (Buy & Hold) |
|---|---|---|
| CAGR (1988–2026) | ~13.8% | ~9.1% |
| Max Drawdown | -22% | -58% |
| Time in market | ~78% | 100% |
| Tax efficiency | Lower (trades trigger) | Higher (buy and hold) |
| Monthly effort | 5 minutes | 0 minutes |
| Best for | Active but systematic investor | True passive investor |
Dual Momentum Pros and Cons
Advantages
- ✓ Historically higher CAGR than buy-and-hold
- ✓ Dramatically lower drawdowns
- ✓ Only 3 ETFs required
- ✓ 5 minutes of work per month
- ✓ Removes emotion from investing
- ✓ Well-documented academic backing
Disadvantages
- ✗ Whipsaw losses in choppy markets
- ✗ Can lag in sustained bull runs
- ✗ Taxable events on each trade
- ✗ Requires discipline to follow signals
- ✗ Bond + equity selloff (2022) can hurt
- ✗ Past performance ≠ future results
Frequently Asked Questions
How do I get the 12-month signal data?
Use the StrategyIndex.io Signals Dashboard for pre-calculated monthly signals. Alternatively, use Yahoo Finance or Portfolio Visualizer. Record the NAV/price of each ETF on the last trading day of the month, and compare against the same day 12 months prior.
Which broker should I use as a European investor?
Interactive Brokers (lowest commissions, best ETF access), DEGIRO (low-cost, Dutch-based), or Trading 212 (commission-free). Key requirements: access to CSPX/IWDA/AGGH on major European exchanges. Avoid brokers that restrict UCITS ETF trading.
Can I use a lookback period other than 12 months?
Yes. Antonacci tested periods from 3 to 12 months. Shorter lookbacks (3–6 months) produce more trades and higher turnover. The 12-month period has the strongest academic backing and lowest transaction costs. Do not change the lookback period based on recent performance — this is data mining.
Explore More
Ready to apply Dual Momentum?
Check this month's signal, explore the interactive backtest, or compare Dual Momentum to other strategies.