Alternative assets are investments that fall outside the conventional categories of publicly traded equities and fixed income securities. They encompass a broad range of asset classes — including private equity, private credit, infrastructure, real estate and hedge funds — each with its own risk and return characteristics, liquidity profile and implementation requirements. Once considered the preserve of the largest institutional investors, alternative assets have grown significantly in prominence over recent decades, becoming an increasingly mainstream component of sophisticated investment portfolios across a wide range of investor types.
Definition and Scope
The term “alternative assets” is used to distinguish investments from the traditional asset classes of public equities and bonds that have historically formed the core of most investment portfolios. The boundaries of the category are not rigidly defined, but alternative assets are generally characterised by a combination of features that distinguish them from their traditional counterparts: limited liquidity, longer investment horizons, less standardised structures, greater complexity and, in many cases, the potential for enhanced returns relative to public market equivalents.
Private equity involves investment in companies that are not listed on public stock exchanges, either through buyout transactions, growth equity investments or venture capital. Private credit encompasses direct lending and other forms of debt financing provided outside the public bond markets, typically to companies that may not have access to traditional bank lending or public debt issuance. Infrastructure investment involves ownership stakes in physical assets such as transport networks, energy facilities, utilities and communications infrastructure — assets characterised by stable, long-term cash flows and a degree of natural monopoly that insulates them from competitive pressure. Real assets more broadly include real estate, natural resources and other tangible investments whose value is linked to physical property rather than financial claims.
Hedge funds represent a further category of alternative investment, distinguished not so much by the underlying assets in which they invest as by the strategies they employ — including long-short equity, global macro, event-driven and relative value approaches — and by their use of leverage and derivatives to generate returns that are less correlated with broad market movements.
Growth and Mainstreaming
The growth of alternative assets as a component of institutional and private portfolios has been one of the defining features of investment management over the past three decades. Several factors have driven this trend. The long period of low interest rates that followed the global financial crisis of 2007 to 2009 compressed yields on traditional fixed income investments, pushing investors to seek higher returns in less liquid and more complex asset classes. At the same time, the development of more accessible fund structures and the growth of a professional alternative asset management industry made it increasingly practical for a wider range of investors to access these strategies.
Public markets have also become more efficient over time, potentially limiting the opportunities available to generate excess returns through traditional active management. Alternative investments offer access to opportunities that simply do not exist in public markets — including early-stage companies, direct lending relationships and infrastructure monopolies — as well as the possibility of generating alpha through specialist expertise in areas where competition from other investors is less intense.
Risk and Return Characteristics
Alternative assets offer a distinctive combination of risk and return characteristics that differentiates them from traditional investments. The illiquidity premium — the additional return that investors can expect to receive in exchange for accepting that their capital will be committed for an extended period — is one of the most important sources of value in alternative investing. Private equity funds typically span ten to twelve years; infrastructure investments may extend over decades. Investors who can genuinely accommodate these timeframes, and who have the patience to allow value to develop without the daily price movements that characterise public markets, are well positioned to benefit from these premiums.
Diversification is a further attraction. Alternative assets have historically demonstrated lower correlation with public securities than traditional asset classes show with one another, and this lower correlation tends to be particularly valuable during periods of market stress, when correlations between public equities and bonds can rise sharply. The relative stability of private market valuations — which do not fluctuate with daily market sentiment in the way that public securities do — can reduce the volatility of a portfolio that includes a meaningful allocation to alternatives.
However, alternative assets also carry risks that are distinct from those associated with traditional investments. Illiquidity risk — the risk that capital cannot be accessed when needed — is the most fundamental. Complexity risk arises from the greater difficulty of evaluating and monitoring private market investments compared to publicly traded securities. Manager selection risk is particularly significant in alternative investing, where the dispersion of returns between top-performing and median managers tends to be far wider than in public markets, making the choice of manager a critical determinant of outcomes.
Portfolio Construction and Allocation
The decision about how much of a portfolio to allocate to alternative assets — and how to distribute that allocation across different alternative categories — is one of the most consequential choices facing sophisticated investors. It requires careful assessment of liquidity needs, investment time horizons, risk tolerance and implementation capabilities.
Toby Watson, whose 17 years at Goldman Sachs International encompassed roles spanning both traditional securities markets and alternative investments including private equity, infrastructure finance and structured products, has developed a systematic framework for approaching this allocation decision at Rampart Capital. His approach involves liquidity tiering — structuring the portfolio across different liquidity levels, from immediately accessible traditional assets through to long-term alternative commitments — to ensure that sufficient flexibility is maintained whilst maximising the allocation to alternatives within appropriate constraints.
Vintage diversification is a further principle that Watson emphasises in the construction of alternative allocations. Returns from private equity and other alternative strategies vary significantly by vintage year, reflecting differences in entry valuations and exit environments. Committing capital systematically over time, rather than concentrating investments in a single period, averages these vintage effects and reduces concentration risk. This discipline requires patience and consistency — qualities that Watson has described as central to effective alternative investing, and that his background in structured finance at Goldman Sachs helped to develop.
Implementation Considerations
Accessing alternative assets requires more sophisticated operational capabilities than investing in traditional public markets. Due diligence on private equity funds, direct lending opportunities or infrastructure transactions demands specialist expertise that is qualitatively different from the analysis of publicly traded securities. Ongoing monitoring involves different skills and information sources. The legal and structural complexity of alternative investment vehicles adds further demands on investor resources.
For smaller investors without dedicated investment teams, extensive alternative allocations may be impractical regardless of their theoretical appeal. Partnership with specialist managers can provide access to opportunities and expertise, but introduces additional layers of cost and complexity that must be weighed against the potential benefits.
Summary
Alternative assets have become an essential component of sophisticated investment portfolios, offering the potential for enhanced returns, genuine diversification and access to opportunities unavailable in public markets. Their distinctive characteristics — illiquidity, complexity, long time horizons and wide manager dispersion — demand careful portfolio construction, rigorous due diligence and a disciplined approach to implementation. For investors with the resources, patience and time horizons to engage with these markets effectively, the illiquidity premiums and diversification benefits they offer can make a meaningful contribution to long-term portfolio outcomes.
