60/40 portfolios – the limits of traditional diversification in 2026

For decades, combining equities and bonds formed the backbone of portfolio diversification. After a prolonged period of low inflation and generally stable equity–bond correlations, the traditional 60/40 portfolio is increasingly being questioned. In the current market regime, correlations between equities and bonds have become less reliable, reducing the stabilising effect investors once expected from adding bonds to stock positions.

As inflation pressures have re-emerged and interest-rate volatility has increased, investors are looking beyond traditional asset classes in search of additional sources of return and risk control. Against this backdrop, liquid alternatives are increasingly being considered as a way to complement traditional portfolios as a third component with more diversified return drivers.

In its 2026 Outlook for Liquid Alternatives, Apollo Multi Asset Management describes a market environment shaped less by outright recession risk and more by persistent imbalance. Consensus forecasts place global GDP growth at just under 3% in 2026, with moderating momentum in the US, fragile conditions in Europe and a mixed outlook across China and emerging markets. Inflation is expected to remain above post-financial-crisis norms, reinforcing a regime in which traditional diversification assumptions — including the role of bonds as portfolio stabilisers — are increasingly challenged.

Concentration risk and persistent volatility

Beyond the macro outlook, market structure itself has become a growing source of concern. As several analyses show, the ten largest US companies now represent more than 20% of total global equity market exposure. Such levels of concentration increase portfolio fragility, leaving portfolios more exposed to shifts in market leadership or abrupt changes in sentiment.

At the same time, volatility is expected to remain a persistent feature of markets in 2026. Uncertainty around the timing and scale of interest-rate cuts, geopolitical fragmentation, credit events and the ongoing investment cycle linked to artificial intelligence all contribute to a more complex investment backdrop. In this context, investors are increasingly focused on how to diversify across return drivers rather than asset classes alone.

“The environment calls for greater resilience, broader sources of return, and risk management that goes beyond equity beta and duration,” says Steve Brann, Chief Investment Officer of Apollo Multi Asset Management.

From add-on to core component: why liquid alternatives are becoming structurally more important

Against this background, hedge funds and liquid alternatives are increasingly viewed not as tactical allocations but as structural components of portfolios. Apollo points to research from Wellington Management, which has described hedge funds as a “missing ingredient” in diversified portfolios, citing their potential to help offset weakening bond diversification, reduce portfolio volatility and provide non-beta sources of return.

Industry data also point to a renewed institutional commitment to the space. According to research from S&P Global and With Intelligence, the hedge fund industry is expected to sustain assets of around $5 tn and beyond through 2027, supported by continued institutional inflows. Event-driven, macro and long/short equity strategies are among those attracting the strongest inflows. UBS and Goldman Sachs have similarly highlighted an environment in which dispersion between winners and losers is likely to increase, placing a premium on active selection and flexible mandates.

Why 2026 could be a hedge fund year: alpha, dispersion, volatility

While some outlooks continue to highlight opportunities in private markets, the research cited by Apollo suggests that several alternative asset classes face meaningful constraints in the current environment. Private equity and private credit remain important components of institutional portfolios, but deal activity has been uneven, return expectations are moderating and liquidity remains constrained. Valuation uncertainty and slower capital distribution cycles further complicate portfolio planning, particularly at a time when flexibility is becoming more valuable.

Similar challenges apply to real assets and infrastructure investments. Although they can serve as long-term inflation hedges, access is often restricted, valuations can lag market conditions and transaction activity tends to be cyclical. For investors navigating a macro regime characterised by persistent volatility and shifting correlations, these structural limitations have become more difficult to ignore.

Apollo argues that hedge fund strategies and liquid alternatives stand out for a different set of characteristics when accessed through an appropriate investment structure. While many underlying hedge funds offer periodic rather than daily liquidity, Apollo’s approach uses a UCITS fund-of-funds framework designed to provide daily dealing at the portfolio level. This structure aims to combine exposure to hedge fund-style return drivers with greater flexibility, transparency and liquidity for investors.

In this context, the ability to exploit dispersion, relative value opportunities and volatility is increasingly seen as an advantage rather than a trade-off. Rather than relying on broad market beta, hedge fund strategies are designed to extract value from relative pricing inefficiencies, corporate actions and macro dislocations — features that Apollo expects to remain prevalent in the current market cycle.

How multi-strategy approaches are positioned for 2026

Taken together, the research highlighted by Apollo suggests that the investment challenge today is less about timing markets and more about constructing portfolios that can withstand a wider range of outcomes. Elevated concentration, unstable correlations and ongoing volatility have reduced the effectiveness of traditional diversification tools, placing greater emphasis on strategies that can operate independently of broad market direction.

In this environment, liquid alternatives and multi-strategy approaches are increasingly being assessed not as opportunistic additions but as structural components of portfolios. By combining multiple, differentiated return sources within a liquid framework, such strategies seek to address the growing gap between the diversification investors expect and what traditional asset allocations are able to deliver.

Apollo positions its diversified multi-strategy portfolios as a response to these challenges. The firm emphasises diversification across strategies and managers, a focus on risk control and active manager selection, and exposure to multiple independent return drivers — including macro, long/short equity, market-neutral, event-driven and credit-related strategies — in an effort to reduce reliance on any single source of return.