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For years, decades even, the 60/40 portfolio has been the asset allocation of choice for investors. That asset allocation, which was based on the work of Nobel Prize-winning economist Harry Markowitz, provided investors with a way to maximize expected returns based on a given level of risk. Under the theory, known as the modern portfolio theory or MPT, investors would reduce the total risk of the portfolio through diversification: investing in assets that have low positive correlation or even negative correlation.”

Why Now?

  • Longer lifespans may require portfolios to support retirement spending for more years.
  • Inflation can erode purchasing power and increase the amount of income retirees need over time.
  • Changing market dynamics may reduce the reliability of traditional stock-and-bond portfolios.
  • As a result, retirement portfolios may need to evolve to support both accumulation and retirement income outcomes.

In 2022, we experienced an unusual phenomenon where both stocks and bonds were down double-digits. Advisors and investors questioned the merits of diversification. After all, haven’t we been conditioned to think that stocks and bonds are diverse, and in theory should serve to reduce portfolio volatility.  

According to Callan Associates,1 there have been only two other years since 1926 when both stocks and bonds have been negative—1931 and 1969. In fact, correlations have been rising in recent years, especially when there are market shocks. Rising correlations has caused advisors and investors to question their allocations in retirement plans.

We should be careful to separate the potential benefits of diversification and the 60/40 portfolio as a proxy. Correlations across most traditional investments have been rising over the last couple of decades, due in part to the interconnectivity of the financial markets, as well as the free flow of information, which means that most information is available and reflected in valuations.

Exhibit 1: Challenging the Merits of the 60/40 Portfolio

US 60% Stock/40% Bond Index Portfolio
1976-2025

Note: Stock represented by the MSCI USA Index. Bond is represented by the Bloomberg US Aggregate Index. Total returns were considered.Source: FactSet, MSCI, Bloomberg Indices. Indexes are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. See www.franklintempletondatasources.com for additional data provider information.

However, as we will explore later in this paper, private markets have historically exhibited a low-to-negative correlation to traditional investments. Product innovation is also making these investments more accessible to a broader group of investors, at lower minimums and with greater flexibility. Now, advisors and investors can leverage these kinds of investments to potentially improve portfolio outcomes. In this paper, we will examine the following issues:

  • What are the limitations of current retirement planning tools and techniques?
  • What lessons can be learned from institutions?
  • What role do private markets play in achieving client goals?
  • What are the differences in the accumulation versus decumulation phases?

We will use two case studies to illustrate the impact and versatility of adding a diversified allocation with private markets to investors at the accumulation and decumulation phase of retirement.

At its core, retirement investing is no longer just about accumulating assets. Retirement portfolios must help investors build wealth during their working years and convert that wealth into sustainable income throughout retirement. In a world of longer lifespans, inflation and changing market dynamics, advisors may need to reconsider whether traditional portfolio approaches are sufficient to support those outcomes.

Key Takeaways

Retirement portfolios may need to evolve to support income outcomes in a world of longer lifespans, inflation and changing market dynamics. While traditional stocks and bonds remain foundational building blocks, advisors and investors may benefit from a broader toolkit to help balance growth, income, purchasing-power preservation and portfolio resilience throughout both accumulation and decumulation. Overall, retirement plans should be modernized to reflect the broader set of tools available to pursue client goals. We expect to see more target-date funds including private market allocations. This will be a gradual process as all stakeholders gain comfort with this more modern allocation of capital.

We believe advisors and investors should rethink their retirement strategies to respond to the changing market environment, the new products at their disposal and the fact that many retirees are living longer, more productive lives through their retirement years. Private markets can play multiple roles in retirement portfolios, from potentially generating growth and income to dampening volatility, to hedging the impact of inflation.

Advisors and investors should develop different approaches for the accumulation and decumulation phases of retirement and should periodically revisit retirement plans to ensure they are on target for meeting investors’ goals. If used appropriately, private markets can improve the likelihood of achieving the various goals through the retirement planning phases.

To learn more about accessing private markets, please visit our dedicated website. And if you haven’t already done so, please subscribe to the Alternative Allocations podcast series to hear from industry experts.



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