Many investors focus on average investment returns. In retirement planning, however, the timing of returns can sometimes be just as important as the returns themselves.
Sequence risk refers to the possibility that the order in which investment returns occur may influence retirement outcomes. Two retirees may experience identical average returns over time and yet experience very different results.
The concept becomes particularly important during retirement because portfolios are often supporting withdrawals. Assets withdrawn during periods of market decline are no longer available to participate in future recoveries.
Poor investment performance early in retirement can therefore have lasting consequences. Losses occurring during the withdrawal phase may place additional pressure on a portfolio even if long-term average returns eventually appear reasonable.
Sequence risk is different from average-return risk. A portfolio may achieve its expected long-term return while still producing disappointing retirement outcomes if the return sequence is unfavourable.
The concept helps explain why retirement sustainability cannot always be evaluated using average returns alone. The timing of returns may materially influence how long a portfolio is able to support retirement income.
Sequence risk does not guarantee failure. It is one of many factors that influence retirement outcomes. Spending flexibility, withdrawal strategies, asset allocation, and other planning decisions may also affect results.
Understanding sequence risk helps explain why retirement planning often focuses on sustainability and resilience rather than on average returns alone.
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Introduction
Many retirement planning discussions focus on investment returns.
Investors often compare portfolios using average annual returns, long-term performance statistics, and expected future growth rates. As a result, it is natural to assume that retirees who experience similar long-term returns would experience similar retirement outcomes.
Retirement planning does not always work that way.
For retirees who depend on investment assets to support spending, the timing of returns can sometimes be just as important as the returns themselves. Two portfolios may achieve identical average returns over time and yet produce very different retirement experiences.
This phenomenon is commonly referred to as sequence risk.
Sequence risk receives significant attention in retirement planning because retirement portfolios often serve a dual purpose. They are expected to continue growing while simultaneously providing income. When withdrawals occur during periods of poor market performance, the long-term consequences may differ from those experienced during the accumulation years.
Understanding sequence risk helps explain why retirement sustainability cannot always be evaluated using average returns alone. It also helps explain why discussions about withdrawal rates, retirement income planning, and retirement sustainability frequently extend beyond simple return assumptions.
What Is Sequence Risk?
Sequence risk refers to the possibility that the order in which investment returns occur may influence retirement outcomes.
The concept may seem surprising at first because many investors naturally focus on average returns. If two portfolios produce the same long-term average return, it may seem reasonable to expect similar results.
Sequence risk challenges that assumption.
When a portfolio is supporting withdrawals, the timing of returns can matter just as much as the returns themselves. Poor performance early in retirement may affect a portfolio differently than poor performance occurring much later, even if the long-term average return remains unchanged.
This distinction exists because retirement portfolios are often serving two purposes simultaneously. They are expected to provide income through withdrawals while also continuing to support future growth.
As a result, retirement outcomes may be influenced not only by how much a portfolio earns, but also by when those returns occur.
Understanding this concept is important because sequence risk is one of the primary reasons retirement planning often extends beyond average return assumptions and historical performance statistics.
Why Sequence Risk Matters During Retirement
Sequence risk becomes particularly important during retirement because portfolios are often supporting withdrawals.
During the accumulation years, investors are typically adding money to their portfolios. Market declines may be unpleasant, but contributions continue and assets remain invested with the potential to participate in future recoveries.
Retirement changes the situation.
Instead of contributing assets, retirees often withdraw assets to support spending. When withdrawals occur during periods of poor market performance, a portion of the portfolio may be permanently removed at depressed values.
Those withdrawn assets are no longer available to participate in future recoveries.
This characteristic helps explain why market declines early in retirement often receive more attention than similar declines occurring later. The portfolio may have fewer assets available to benefit from a subsequent recovery, which may influence long-term sustainability.
The issue is not merely whether markets decline. The issue is whether withdrawals occur while the portfolio is experiencing those declines.
Identical Returns, Different Outcomes
One of the most surprising aspects of sequence risk is that identical average returns do not necessarily produce identical retirement outcomes.
Consider two retirees with similar portfolios, similar spending needs, and identical long-term average investment returns.
At first glance, it may seem reasonable to expect similar results.
However, if one retiree experiences poor market performance early in retirement while the other experiences poor performance much later, the outcomes may differ significantly.
The reason is that withdrawals interact with investment returns.
When a portfolio experiences losses early in retirement, withdrawals may reduce the number of assets available to participate in future recoveries. Even if markets eventually perform well, the portfolio may have fewer assets remaining to benefit from that growth.
By contrast, a retiree who experiences stronger returns during the early years may allow the portfolio to grow before later market declines occur. Although both retirees may ultimately experience the same average return, the sequence of those returns may lead to very different retirement outcomes.
This observation is one of the most important lessons in retirement planning.
Retirement sustainability depends not only on how much a portfolio earns over time, but also on when those returns occur.
Sequence Risk Versus Average Return Risk
Sequence risk is often confused with average return risk.
The two concepts are related, but they are not the same.
Average return risk focuses on the possibility that investment returns may be lower than expected. Sequence risk focuses on the possibility that the timing of returns may affect retirement outcomes.
A retiree may experience sequence risk even when long-term average returns ultimately meet expectations.
This distinction helps explain why retirement projections often consider more than average return assumptions alone. Two portfolios producing identical average returns may still experience different outcomes if the order of those returns differs.
Understanding this difference helps place investment performance into context. Successful retirement planning often requires evaluating both the level of returns and the sequence in which those returns occur.
Factors That May Influence Sequence Risk
The practical impact of sequence risk is not identical for every retiree. Several factors may influence the extent to which unfavourable return sequences affect retirement outcomes.
One factor is the withdrawal rate itself. Larger withdrawals generally place greater demands on a portfolio and may increase the portfolio's sensitivity to poor market performance during the early years of retirement.
The level of spending flexibility may also influence outcomes. Retirees who are able to adjust spending in response to changing circumstances may experience different outcomes than retirees who require a fixed level of income regardless of market conditions.
Asset allocation can also play a role. Different portfolio structures may respond differently to market declines and recoveries, which may influence the degree to which sequence risk affects retirement outcomes.
The availability of other retirement income sources may be relevant as well. Workplace pensions, government benefits, employment income, and other sources of cash flow may affect the extent to which a retiree depends on portfolio withdrawals.
These observations do not imply that any particular approach is universally superior. Rather, they help explain why sequence risk may affect retirees differently even when portfolio values and long-term return expectations appear similar.
Understanding these factors helps place sequence risk within the broader context of retirement planning and retirement sustainability.
Sequence Risk and Retirement Sustainability
Sequence risk is closely connected to retirement sustainability.
Retirement sustainability is concerned with the ability of assets and income sources to support spending over time. Sequence risk highlights one of the reasons that sustainability can be difficult to evaluate using average returns alone.
A retirement plan may appear sustainable when viewed using long-term average assumptions. However, the actual path followed by investment returns may influence whether those assumptions translate into real-world outcomes.
This observation helps explain why retirement planning often focuses on resilience as well as expected outcomes. The objective is not simply to estimate what may happen under average conditions. The objective is also to understand how a retirement plan may respond to less favourable circumstances.
Sequence risk therefore serves as an important reminder that retirement outcomes are shaped not only by long-term expectations but also by the path taken to reach them.
Final Thoughts
Sequence risk is one of the most important retirement planning concepts because it challenges a common assumption: that average investment returns alone determine retirement outcomes.
In reality, the timing of returns may matter just as much as the returns themselves. When portfolios are supporting withdrawals, poor market performance early in retirement may affect long-term sustainability differently than similar market performance occurring later.
This observation helps explain why retirement planning often extends beyond average return assumptions and portfolio growth projections. Retirement outcomes are influenced not only by how much a portfolio earns, but also by the path taken to achieve those returns.
Understanding sequence risk therefore provides a more complete perspective on retirement sustainability. It highlights the importance of evaluating retirement income strategies within the context of uncertainty rather than relying solely on long-term averages.
The objective is not to predict the future sequence of investment returns. The objective is to recognize that retirement outcomes may be influenced by more than long-term averages and to understand how different return sequences may affect the sustainability of a retirement plan.
Key Takeaways
- Sequence risk refers to the possibility that the order of investment returns may influence retirement outcomes.
- The concept becomes particularly important during retirement because portfolios are often supporting withdrawals.
- Poor market performance early in retirement may have a greater impact on sustainability than similar market performance occurring later.
- Two retirees may experience identical long-term average returns and yet experience very different retirement outcomes.
- Sequence risk is different from average return risk. The timing of returns may matter even when average returns meet expectations.
- Withdrawal rates, spending flexibility, asset allocation, and other income sources may influence how sequence risk affects retirement outcomes.
- Retirement sustainability depends not only on how much a portfolio earns, but also on when those returns occur.
- Understanding sequence risk helps place retirement income planning, withdrawal strategies, and retirement sustainability discussions into context.
Important Notes
This article is intended for educational purposes only.
Sequence risk is one of many factors that may influence retirement outcomes. Investment returns, inflation, taxation, longevity, spending requirements, withdrawal strategies, and retirement objectives may also play important roles.
The examples and concepts discussed in this article are intended to explain retirement planning principles rather than predict future market performance.
Retirement projections often rely on assumptions regarding future returns. Actual return sequences may differ materially from those assumptions.
Sequence risk is usually evaluated within the context of a broader retirement income plan rather than as an isolated investment concept.