Private Markets Are a Portfolio, Not a Collection of Opportunities

By Simba Marekera, Global Head Private Markets

Private-market opportunities tend to arrive one at a time. Portfolios should not be built that way. 

A manager raises a new fund. A compelling co-investment appears. A private credit opportunity offers an attractive yield. An infrastructure strategy provides exposure to a theme an investor has been looking for. 

Each opportunity is usually presented, assessed, and decided individually. 

But that is not how the resulting portfolio behaves. 

Once made, investments sit alongside one another, competing for capital and carrying exposures more similar than their labels suggest. 

For investors building meaningful allocations to private markets, the question therefore cannot simply be: Is this a good investment?

It also needs to be: What does this investment add to the portfolio I already have? 

That distinction is fundamental to how Brightlight thinks about private-market portfolio construction. Investments need to be considered together, with diversification assessed across risk and return drivers behind asset class, impact theme, geography, vintage year and economic exposure, rather than only in isolation. 

A collection of good funds does not necessarily make a good portfolio 

Diversification can look deceptively simple in private markets. 

An investor might hold private equity, private credit, infrastructure, real assets and venture capital and reasonably conclude that the portfolio is diversified by asset class. 

Look through the labels and a different picture emerges. Growth-oriented funds may share sensitivity to financing costs and exit markets, and commitments made close together can create vintage concentration. 

What risks and return drivers do we actually own? 

Every investment needs a job

One way to improve private-market portfolio construction is to be explicit about the role an investment is expected to play before committing capital. 

For example, is it intended to: 

  • generate income; 

  • provide long-term capital growth; 

  • create exposure to real assets or infrastructure; 

  • diversify listed-market risks; 

  • provide access to a particular geography or economic exposure; 

  • advance an identified impact or values objective; or 

  • combine several of those objectives? 

The answer matters because two individually attractive investments may be competing for the same job. 

The next investment should not simply be attractive. It should make the portfolio better. 

Cash flow is part of portfolio construction

Private markets introduce another dimension that can be easy to underestimate: time. 

Capital may be drawn over several years. Distributions are inherently uncertain. Funds of different vintages can move through deployment, investment, harvesting, and extension periods simultaneously. 

That means portfolio construction needs to consider not only where capital is allocated, but when capital is likely to be required and returned. 

Mapping expected calls and distributions helps reduce the risk that unexpected cash movements disrupt the investor’s broader asset allocation. 

As a program matures, the challenge shifts to balancing new commitments against undrawn commitments; expected distributions and exposures already accumulated. 

Today’s portfolio should influence tomorrow’s commitments 

After several years, investors know things about their portfolio that they could not have known when it was first designed. 

The next commitment should respond to that information. 

That may mean favouring a different vintage, strategy or geography, or slowing commitments rather than allocating simply because an attractive opportunity is available. 

Opportunity selection and portfolio construction are different disciplines

Investment research should help an investor understand a manager’s philosophy, people, process, positioning, performance, pricing and purpose, and determine whether the opportunity warrants investment consideration. 

A fund can pass due diligence and still be the wrong investment for a particular portfolio at a particular point in time. 

That is why the two disciplines need to remain connected but distinct: 

  • Investment research asks: Is this opportunity worth owning? 

  • Portfolio construction asks: Should we own it, how much should we own, and what does it change about everything else? 

For private-market investors, answering both questions consistently is what turns individual opportunities into a portfolio. 

To build a portfolio in which each investment has a purpose, the exposures work together, liquidity is understood, and each new commitment makes the whole stronger. 

Building a private-markets portfolio? 

Brightlight works with investors to think through private-market allocations in the context of their broader portfolio, from portfolio construction and commitment pacing to manager research and due diligence. 

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