Systematic Global Macro Investing: Model-Driven Strategies Across Asset Classes

Global macro is the broadest investment approach in the investment universe: a fund that trades global macro has no fixed constraints on geography, asset class, or direction. It might be long Japanese yen and short US Treasuries, long crude oil and short European equities simultaneously — taking positions based on a macro thesis rather than bottom-up analysis of individual companies. Systematic global macro applies the same broad mandate but replaces human judgement with quantitative models that process economic signals and execute trades according to pre-defined rules. The result is an approach with meaningfully different behaviour from most traditional asset classes — one that has historically offered genuine diversification during equity market crises.

Discretionary vs Systematic Macro

The distinction between discretionary and systematic macro is the single most important structural difference in the category.

Discretionary macro — the approach associated with George Soros, Stanley Druckenmiller, Louis Bacon, and their successors — is driven by a macro analyst's conviction about how economic and political forces will reshape asset prices. The classic example is Soros's 1992 trade against sterling, which exploited the unsustainability of the ERM's exchange rate mechanism. Discretionary managers form a thesis, size the position according to conviction, and manage it dynamically. Returns depend entirely on the manager's insight and judgement; capacity is limited; and the strategy cannot be easily replicated.

Systematic macro (also called trend-following, managed futures, or CTA — Commodity Trading Adviser) replaces the human thesis with quantitative models. The models process objective signals — price momentum, economic surprise indices, interest rate differentials, carry metrics — and generate trade signals across a universe of liquid futures contracts. Position sizing is rules-based; execution is largely automated. The approach is replicable (models can be tested on historical data), scalable (systematic execution handles many markets simultaneously), and emotionally neutral (models do not panic or become overconfident).

In practice, many sophisticated managers blend both approaches — quantitative signals provide the structure, while human oversight allows for adaptation in novel market regimes.

The Core Inputs of Systematic Global Macro

Systematic macro models draw on a range of inputs, depending on the fund's specific design:

Price momentum: The most widely used signal in systematic macro. Assets that have risen over the past 3–12 months tend to continue rising over the following months; those that have fallen tend to continue falling. This "trend-following" signal has been documented across asset classes and time periods for over a century. The intuition is that investors slowly update their views — news diffuses gradually rather than instantaneously — and institutional flows reinforce trends.

Interest rate differentials (carry): Borrowing in a low-interest-rate currency and investing in a high-interest-rate currency generates a carry return, as long as exchange rates do not move enough to offset the interest differential. Carry strategies in FX have historically generated positive long-run returns but experience sharp losses during crisis periods when carry trades unwind simultaneously.

Economic surprise indices: Developed by Citigroup and others, these indices measure whether economic data releases are beating or missing consensus expectations. Positive surprises in economic data tend to be associated with currency appreciation and equity market gains; negative surprises the reverse. Systematic macro managers incorporate these signals to position around macro data flow.

Commodity momentum and carry: Commodity futures exhibit trend and carry properties that are partially independent of equity and bond markets, providing additional diversification within a systematic macro portfolio.

Cross-asset momentum: Some managers explicitly model the momentum of one asset class spilling over into another — for example, using equity market trends as a signal for currency positioning.

Diversification Across Asset Classes

A defining feature of systematic global macro is its breadth. Major managed futures programmes trade simultaneously in:

• Equity index futures: S&P 500, Euro Stoxx, FTSE 100, Nikkei, Hang Seng, and others.
• Bond futures: US Treasuries, German Bunds, UK Gilts, Japanese JGBs.
• Currency forwards and futures: G10 and selected emerging market currencies.
• Commodity futures: Energy (crude oil, natural gas), metals (gold, silver, copper), agricultural (wheat, corn, soy, coffee).

The diversification across these markets and the ability to go both long and short within each means that a systematic macro fund's return is largely uncorrelated with whether equity markets rise or fall. Performance depends on whether trends emerge and persist — a feature of markets that is present in both rising and falling environments.

Performance in Equity Bear Markets

The crisis correlation profile of systematic macro is perhaps its most attractive feature for portfolio construction. During equity bear markets — which tend to be accompanied by strong trends in rates, currencies, and commodities — trend-following models often generate strongly positive returns.

Documented examples include:

• 2008 financial crisis: Many major CTA funds delivered double-digit positive returns as global equities fell approximately 40%, benefiting from long bond/short equity trends.
• 2022 rate shock: Systematic macro was one of the few strategies to generate positive returns as both equities and bonds fell sharply simultaneously, benefiting from short bond trends (rising yields) and energy long positions.

This "crisis alpha" — positive performance during equity crises — is the primary portfolio construction rationale for including systematic macro in a diversified portfolio. A 10–15% allocation to strategies with negative correlation to equities during crises can meaningfully reduce the tail risk of a traditional portfolio.

The caveat: in range-bound or choppy markets with no persistent trends (early 2019, 2011, and periods of 2023), systematic macro strategies can produce flat to negative returns as false trend signals are generated and positions reversed at a loss.

Risk-Adjusted Returns

Academic research on trend-following strategies — across a variety of markets and time periods — suggests typical Sharpe ratios in the range of 0.3–0.7 over the long run. This is similar to equities on a risk-adjusted basis but, crucially, with a different return pattern: systematic macro earns its return by being patient through flat periods and capturing returns during trend environments, rather than steady compounding interrupted by large drawdowns.

Maximum drawdowns for major managed futures programmes have typically been in the range of 10–25%, compared with 40–60% for equity indices in severe bear markets. This asymmetric drawdown profile — large market drawdowns often coincide with positive CTA returns — makes the strategy an effective portfolio hedge over a full cycle.

Accessible Investment Vehicles

Offshore hedge funds: The largest and most established systematic macro managers — Man AHL (part of Man Group), Winton Group, Millburn Ridgefield — operate primarily through offshore Cayman-domiciled hedge funds. Minimum investments typically in the range of $1m–$5m; suitable for non-UK-domiciled structures or UK investors able to invest in non-UCITS products.

UCITS liquid alternatives: A growing number of UCITS funds provide access to systematic macro strategies within the EU/UK regulatory framework. Examples include the Man AHL Diversified Futures Fund (UCITS) and various similar offerings from Janus Henderson, Aspect Capital, and others. UCITS funds can be held in UK ISAs and SIPPs (subject to platform availability) and are subject to the investor protections provided by the UCITS framework.

ETFs: A small number of ETFs provide rules-based trend-following exposure. These are generally simple momentum products rather than full systematic macro programmes, offering limited diversification across asset classes relative to dedicated CTA funds.

Cost Considerations

Systematic macro funds — particularly offshore hedge funds — typically charge both a management fee (commonly 1.5–2% per annum) and a performance fee (20% of gains above a high-water mark). These fees are substantial and, over a full cycle, can represent a significant drag on net investor returns.

UCITS versions of systematic macro strategies typically carry lower fees (management fees of 0.5–1%, and performance fees where applicable). The lower fees come alongside UCITS's inherent leverage and liquidity constraints, which may limit the strategy's ability to fully replicate the offshore fund's approach.

When evaluating systematic macro funds, net-of-fees Sharpe ratio and crisis-period performance are more informative than headline gross returns.

Suitability and Allocation Sizing

Systematic macro is generally suitable as a portfolio diversifier rather than a core holding. Given the potential for extended flat periods and the unfamiliarity of the return pattern, allocations of 5–15% of a diversified portfolio are typical in institutional and HNW contexts.

The strategy rewards patience: investors who exit after a flat period — precisely when the strategy has accumulated potential energy in the form of pent-up trends — systematically underperform those who maintain exposure through the full cycle.

Past performance of systematic macro strategies is not a reliable guide to future returns. All investments involve risk of loss. This guide is for informational purposes only and does not constitute financial advice or a recommendation to invest in any specific fund or strategy. Leverage employed within managed futures strategies amplifies both gains and losses. Seek qualified professional advice before investing.

How Global Investments Can Help

Global Investments assists HNW investors in evaluating systematic macro and managed futures strategies as part of a broader portfolio construction process. We can help you assess the correlation benefits relative to your existing holdings, identify appropriate vehicles given your investor status and domicile, and conduct due diligence on specific managers. Our investment team has relationships across both offshore hedge fund structures and regulated UCITS alternatives. Contact us to discuss how systematic macro exposure could contribute to your portfolio's risk management objectives.