Multi-Asset Insights
In a nutshell
- There is no single evergreen hedge for equity tail risk; the defensive behaviour of bonds, FX, commodities and options is highly regime dependent and shaped by growth-inflation dynamics, the origin of shocks, fiscal conditions and market structure
- Government bonds hedge equities effectively when the stock bond correlation is negative and bond specific risks are low. Rising real rates, higher inflation variance and elevated fiscal uncertainty can push correlations positive and weaken their safe haven role
- Within risk assets, diversification is increasingly found through sectors, factors and options rather than simple regional splits, with defensive sectors and tailored option overlays helping to reduce drawdowns when correlations spike
- Effective tail risk management now calls for a dynamic, regime based framework that blends sovereign bonds, alternatives, FX, commodities and options, rather than relying on any single static safe haven
Rethinking safe havens for equity tail risk
Defensive assets are back in focus, but the behaviour of potential safe havens is strongly conditioned by macro regimes, crisis origins and market structure.
Harry Markowitz, the Nobel prize winning US economist and pioneer of Modern Portfolio Theory, once famously said that “diversification is the only free lunch”. If we do not have perfect knowledge of future returns, an investor can reduce overall portfolio risk without sacrificing potential returns by diversifying their portfolio.
But even well diversified portfolios can still carry significant risk. Historically, globally diversified portfolios containing only equities have seen stretches of more than 20 years of negative real returns, while similar bond only portfolios have in some cases faced multi decade real wealth destruction, particularly around major wars and inflationary episodes. The risks associated with these portfolios are still lower than investing in a single stock or bond, but they remain considerable nonetheless.
When thinking about diversification, we tend to focus on building portfolios with more than one asset class – the 60/40 portfolio of stocks and bonds being the classic example. The idea hinges on combining uncorrelated (or negatively correlated) assets to achieve the “free lunch” Markowitz described.
However, asset class dynamics mean this hasn’t always been easy to do, particularly during macro shocks. Even the 60/40 portfolio suffered deep drawdowns in systemic crises such as the First World War and the Great Depression, underlining that simple diversification is not a guarantee against large losses when macro shocks are severe.
Over recent years, average correlations within multi-asset portfolios have trended higher as markets have become more globally integrated. Against this backdrop, defensive assets are back in focus, but historical evidence suggests there is no evergreen hedge for equity tail risk. Instead, the behaviour of potential safe havens is strongly conditioned by macro regimes, crisis origins and market structure.
Figure 1: Multi-asset correlations have risen
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Source: HSBC Asset Management, Bloomberg. Data as of March 2026.
Fixed income and the importance of the stock-bond correlation
Government bonds have been the default hedge for equity risk, but their effectiveness is fundamentally tied to the stock‑bond correlation (SBC). When correlations are negative and bond‑specific risk is low, sovereign bonds can effectively exhibit a negative risk premium, behaving as defensive assets and thus providing an effective equity hedge.
The SBC is dynamic, and historically a positive SBC has been the most persistent regime over time. SBCs also vary between economies. For example, the negative correlation exhibited between 2000 and 2020 was mostly limited to North America, whereas in Europe it had already reversed during the European sovereign debt crisis, led by periphery countries and later joined by core European nations.
Figure 2: Different economies = different behaviour of SBC
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Source: HSBC Asset Management, Bloomberg. Data as of March 2026.
This divergence is an example of how macro conditions play a central role in determining SBC, and thus the suitability of bonds as a diversifying or safe haven asset. Rising real rates and higher inflation variance relative to growth variance tend to push SBC higher, as both equities and bonds sell off in response to inflation or policy shocks. By contrast, rising growth risks, increased risk aversion, flight‑to‑quality flows and more accommodative monetary policy tend to pull SBC lower, as bonds rally when equities fall.
The origin of the shock matters a great deal in this respect. Trade and tariff shocks have historically seen sovereign bonds perform relatively well in equity drawdowns, as growth concerns dominate the potential inflation impacts. By contrast, periods of elevated military spending often involve shifting part of the fiscal burden onto bondholders through surprise inflation and financial repression, leading to weak real bond performance even as risk assets sell off.
Recent history has highlighted an additional layer: market microstructure. During the early phase of the Covid pandemic, US Treasuries briefly sold off alongside equities as dealer balance sheet constraints and forced liquidations overwhelmed safe haven flows, showing that even benchmark sovereigns can experience pro‑cyclical price action when intermediation capacity is strained.
In environments where the SBC is positive and fiscal uncertainty elevated, alternative strategies have historically played a larger role, including commodity carry, credit carry and bond trend‑following, which has delivered strong returns at near‑zero correlation to 60/40 portfolios and tended to outperform in inflationary periods.
Rate and credit derivatives – such as CDS index protection buyers and receiver swaptions – can also provide targeted hedges to shifts in policy expectations and credit spreads when duration is less reliable as a defensive tool.
Looking ahead, several indicators are relevant for assessing the appropriateness of sovereign bonds as hedges. These include net debt‑to‑GDP, defence‑spending trends, measures of market liquidity and other components of the convenience yield on benchmark sovereign bonds. The supply and demand backdrop is another consideration as government borrowing has crept higher in a number of countries, an effect that may be further exacerbated if geopolitical tensions escalate.
Figure 3: Nominal sovereign bonds can be a safe-haven
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Source: HSBC Asset Management, Bloomberg. Data as of March 2026.
Look to sectors for equity diversification
Finding diversification within equities has become an increasing point of focus for investors as rising index concentration has increased equity risk, particularly in the US where mega‑cap tech stocks have surged. The top 10 stocks now account for an elevated share of returns, making downside risks more asymmetric if leadership reverses.
At the same time, cross‑country equity correlations have risen. Once a popular avenue for diversification, most major regional pairs now exhibit correlations in the 0.6-0.8 range, suggesting that global macro policy and liquidity conditions increasingly dominate local drivers. This reduces the diversification value of simple regional allocation.
Instead, cross-sector correlations display a much broader range of correlation metrics, with sectors such as utilities, telecoms and consumer staples displaying defensive qualities. Further sector analysis using Fama–French industry portfolios shows that defensive leadership is persistent, but downside sensitivity is regime dependent. A good illustration of this is the performance of food and utilities during the Covid pandemic.
Figure 4: Cross-sector correlations display route to equity diversification
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Source: Bloomberg as of March 2026. Note: The correlation is for the last 24 months.
Figure 5: Traditional defensives are consistently more resilient across stress episodes
Source: Eugene F. Fama and Kenneth R. French, Bloomberg as of March 2026. Note: “Crisis Full” represents a broad stress regime capturing the full market event (build-up, drawdown and recovery), providing more observations and more stable defensive metrics. “Crisis Strict” represents a narrower, high-intensity window isolating the peak stress phase, resulting in fewer observations. Dot-com period: 1 Jan 1998–31 Dec 2002. “Now” period: 1 Jan 2021–present. Block for Block-bootstrap had size of 6M.
Factor behaviour adds further nuance. In the US, returns remain heavily influenced by momentum and large‑cap leadership, consistent with narrow index breadth. The value factor has been cyclical – lagging in growth‑dominant, momentum‑heavy phases, but stabilising as macro dispersion and rate volatility increase. Outside the US, value performance has been more stable in Europe, the UK and emerging markets, reflecting different sector mixes and lower exposure to US‑style mega‑cap technology.
FX and commodities in a fragmenting world
Currencies and commodities have long provided important safe haven candidates, but their hedging roles are being reshaped by geopolitical fragmentation, fiscal trajectories and evolving central bank action.
Historically, the US dollar, Swiss franc and gold have been among the assets most frequently providing protection during equity drawdowns. Analysing past crises including the global financial crisis, Covid‑19 and recent geopolitical shocks confirms that these assets have often delivered positive returns when equities sold off, although notable exceptions highlight the conditional nature of their safe haven status.
Figure 6: Performance during major historical risk-off events
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Source: HSBC Asset Management, Bloomberg, February 2026. Periods were defined as: Dotcom Bubble: Apr. 2000 - Sep. 2002, Global Financial Crisis: Nov. 2007 - Feb. 2009, Flash Crash & Eurozone Debt Crisis: May. 2010 - Jun. 2010, U.S. Debt Ceiling Crisis: Jul. 2011 - Sep. 2011, Fed Rate Hike & Trade War: Oct. 2018 - Dec. 2018, Covid-19: Feb. 2020 - Mar. 2020, Ukraine War: Jan. 2022 - Sep. 2022, Bond Market Rout & Recession Fears: Aug. 2023 - Oct. 2023, Liberation Day: Mar. 2025 - Mid Apr. 2025.
The US dollar depreciated sharply in 2025, despite heightened volatility, as aggressive tariffs and debates over Federal Reserve independence eroded confidence, prompting some investors to reduce exposure to US Treasuries. However, during the current episode of tensions in the Middle East, the dollar’s behaviour reverted toward a more traditional safe haven asset, illustrating how political and institutional factors can temporarily override standard risk‑off patterns.
The Swiss franc continues to display classic safe haven characteristics, but its small market size limits its capacity to absorb large global flows. The Japanese yen, meanwhile, transitioned into a more counter‑cyclical currency after 2005, when net foreign income began to exceed the trade surplus, but it remains vulnerable to oil price spikes due to Japan’s net energy importer status.
On the commodity side, gold has evolved from a passive inflation hedge into a strategic competitor to US Treasuries as a reserve asset, particularly for non‑Western central banks seeking sanction resistant assets with zero counterparty risk. At the same time, gold’s short‑term performance remains sensitive to real yields, positioning and technical factors; for example, during the early phase of the Ukraine war, rising real yields weighed on gold despite elevated geopolitical risk. More recently, gold has failed to provide an effective hedge during the current Middle East conflict after its strong run in 2025 and early 2026 meant that it was overvalued coming into the volatility.
Energy prices are generally not an equity hedge, apart from in certain circumstances where geopolitical tensions are centred on oil‑producing regions and supply fears dominate.
Using options for diversification
Options can be used to gain exposure to volatility, particularly through long (equity) option positions that typically benefit from rising implied volatility and negative equity returns during drawdowns. Equity sell-offs are often accompanied by volatility spikes and rising cross-asset correlations, which can weaken traditional diversification. In such regimes, long-volatility option overlays may provide a more defensive, convex return profile.
Options markets are usually accessible during sell-offs, although bid–ask spreads can widen and execution costs can rise. A wide range of strikes and maturities allows payoff profiles to be tailored to specific risks.
Figure 7: Option based strategies as safe havens and reliable diversifiers
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Source: HSBC Asset Management, March 2026.
Long-term benchmark evidence for protective put, collar and covered call strategies suggest that option overlays can reduce maximum drawdowns relative to unhedged equity exposure, but outcomes depend materially on implementation choices (strike, tenor, roll rules) and transaction costs, and they typically reduce upside participation in strong bull markets.
Protective puts tend to offer the strongest crisis protection; collars provide more balanced risk reduction by partially funding the hedge; and covered calls are short volatility strategies that monetise volatility risk premia but generally provide only limited drawdown protection.
Importantly, no single options strategy dominates across all environments; the choice between long‑ and short‑volatility structures depends on expectations about crisis frequency and severity, the level of implied volatility and tolerance for carry costs versus drawdowns. However, they can play a structural role in tail-risk management, particularly when traditional hedges such as bonds, FX or commodities are less reliable.
Dynamic, regime‑based hedging
Across fixed income, equities, FX, commodities and options, the evidence points to a common conclusion: safe‑haven behaviour is highly regime‑dependent rather than fixed. Hedging characteristics have varied with growth-inflation dynamics, the origin of shocks, policy responses, fiscal conditions and market structure, so assets that appeared defensive in one episode have not always played the same role in the next.
Historical crises and the recent experience of 2025–26 illustrate this point clearly: nominal sovereign bonds, traditional safe‑haven currencies, gold, defensive equity sectors and option strategies have each provided material diversification benefits in some environments, yet all have also faced periods when their protective qualities were weaker or briefly reversed. Taken together, this suggests that no single static hedge works across all macro and market regimes, and that effective diversification may call for a more dynamic approach.
Source: HSBC Asset Management, May 2026. The views expressed above were held at the time of preparation and are subject to change without notice. Any forecast, projection or target where provided is indicative only and not guaranteed in any way. HSBC Asset Management accepts no liability for any failure to meet such forecast, projection or target.
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