Infrastructure in multi-asset portfolios: understanding the opportunities and trade-offs

Over the past decade, advisers have increasingly broadened their investment toolkit beyond traditional equities and bonds. As discussed in our previous articles on alternatives¹, the search for diversification, resilience and additional sources of return has led multi-asset managers to incorporate alternative asset classes.

One such example is infrastructure, which despite its growing prominence, remains less familiar to many investors than traditional asset classes. Understanding how infrastructure works as an investment, where it may add value and the potential risks involved is therefore important when assessing multi-asset solutions that incorporate it.

Infrastructure investments provide exposure to the physical assets and systems that support the functioning of modern economies and societies.

These can include transportation networks such as roads, railways, airports and ports, alongside utilities including water, electricity transmission and renewable energy generation. Telecommunications infrastructure such as mobile phone towers, fibre broadband networks and data centres also form an increasingly important part of the opportunity set.

Unlike many traditional businesses, infrastructure assets often provide essential services that remain in demand regardless of economic conditions. This can result in relatively predictable cashflows over extended periods.

However, infrastructure is not a single homogeneous asset class. Different sectors can behave very differently depending on their revenue models, regulatory frameworks and sensitivity to economic growth.

Infrastructure assets often have characteristics that differentiate them from traditional asset classes.

Long-term contracts, regulated revenues or user-based income streams may provide a degree of predictability that can help support portfolio resilience. Some infrastructure assets also have revenues linked to inflation, which can provide a measure of protection if prices rise over time.

As a result, infrastructure is increasingly being considered alongside other alternatives when constructing diversified multi-asset portfolios.

Advisers should understand that there is more than one way to access infrastructure:

• Listed infrastructure: Listed infrastructure investments include infrastructure companies, investment trusts and funds that trade on public markets. Examples might include operators of toll roads, airports, utilities, renewable energy assets or communications networks. The primary benefit of listed infrastructure is liquidity. Investments can generally be bought or sold daily, providing flexibility for portfolio managers and enabling tactical allocation adjustments when necessary. However, because these investments trade on stock exchanges, they can exhibit greater short-term volatility than the underlying assets might suggest. Market sentiment, broader equity market movements and changes in investor risk appetite can all influence valuations.
• Private infrastructure: Private infrastructure investments involve direct ownership of infrastructure assets or participation through private market funds. These investments often provide closer exposure to the underlying asset cashflows and may exhibit lower apparent short-term volatility because they are not priced continuously by public markets. The trade-off is liquidity. Private infrastructure investments may require investors to commit capital for extended periods, making them less suitable for investors who may require access to their money at short notice. Valuations may also be based on periodic appraisals rather than daily market pricing, meaning advisers should understand how performance is measured and reported.

Infrastructure investments provide exposure to the physical assets and systems that support the functioning of modern economies and societies.”

Infrastructure is not a replacement for equities or bonds, but it can complement them within a diversified portfolio.

Diversification: Infrastructure assets often respond to different economic drivers than traditional asset classes. This can help reduce reliance on a single source of return and potentially improve portfolio diversification.

Income potential: Infrastructure assets can generate regular cashflows through user fees, contractual payments or regulated revenues. These characteristics can make infrastructure attractive within portfolios where income generation is an objective.

Inflation sensitivity: Certain infrastructure assets possess pricing mechanisms that enable revenues to increase alongside inflation, either directly or indirectly. While not universal across the sector, this feature has contributed to investor interest during periods of elevated inflation.

Long-term growth themes: Infrastructure can provide exposure to structural trends that are expected to develop over many years, including digital connectivity, energy transition and increasing demand for essential services.

As with any investment, infrastructure introduces specific risks that are important for advisers to understand.

Liquidity constraints: Private infrastructure investments can be difficult to sell quickly and may restrict investor access to capital during certain periods.

Interest rate sensitivity: Although infrastructure is often viewed as a long-term asset class, higher interest rates can affect valuations and financing costs. Some infrastructure sectors may be more sensitive to these changes than others.

Regulatory and political risk: Many infrastructure assets operate within heavily regulated environments. Changes to regulation, government policy or contractual arrangements can affect expected returns.

Valuation complexity: For private infrastructure assets, valuations are typically appraisal-based rather than continuously priced by markets. This can result in return profiles that appear smoother than those of listed investments, although underlying risks remain.

Concentration risk: Individual infrastructure projects can be large and highly specialised. Appropriate diversification across sectors, geographies and revenue sources remains important.

Infrastructure has become an increasingly compelling component of the alternative investment universe, offering characteristics that may complement traditional asset classes within a multi-asset framework.

For advisers, the key consideration is not whether infrastructure is inherently superior to equities or bonds, but how it contributes to overall portfolio objectives. Its potential for diversification, income generation and inflation sensitivity can be attractive, but these benefits need to be weighed against considerations including liquidity, valuation complexity and regulatory risk.

As multi-asset portfolios continue to evolve, infrastructure is likely to remain an important part of the conversation. Understanding how different types of infrastructure investments behave, and where they may be appropriate, can help advisers make more informed portfolio decisions and support better client outcomes.