Two investors can earn the same average return over the same number of years and end up with very different outcomes. The reason comes down to timing, specifically the order in which gains and losses occur.
That timing risk has a name: sequence of returns risk. It is one of the most important concepts in retirement investment risk planning, and one that is easy to overlook until it is too late.
What Is Sequence of Returns Risk?
Sequence of returns risk is the danger that the timing of investment losses, particularly early losses during the withdrawal phase, will permanently damage a portfolio's ability to sustain long-term income.
The average return of a portfolio over time does not tell the full story. What matters just as much is when those returns occur. A portfolio that suffers large losses in the early years of retirement faces a fundamentally different challenge than one that suffers the same losses later.
This risk is most relevant during two key periods:
- The years immediately before retirement, when the portfolio is at its largest and most vulnerable to a large percentage loss.
- The early years of retirement, when withdrawals begin and losses cannot be recovered by continued contributions.
During the accumulation phase, sequence of returns risk matters less. If markets fall early in your investing career, you continue contributing at lower prices and benefit when markets recover. The dynamic reverses entirely once withdrawals begin.
Why Early Losses Hurt More
When you are withdrawing from a portfolio, early losses are far more damaging than late ones. Withdrawals made during a down market permanently remove shares at depressed prices. Those shares are no longer available to participate in the eventual recovery.
Consider a simple illustration:
- Portfolio A experiences losses in years 1 and 2, then strong gains in years 3 to 10.
- Portfolio B experiences strong gains in years 1 to 8, then losses in years 9 and 10.
Both portfolios have the same average annual return over 10 years. But if you are withdrawing $40,000 per year, Portfolio A runs out of money significantly faster than Portfolio B.
The early withdrawals in Portfolio A are made when the portfolio is already down. Each withdrawal represents a larger percentage of the remaining balance. The portfolio cannot compound its way back because there is less of it left to grow.
The same returns, in the wrong order, produce a completely different outcome.
How It Impacts Retirement Planning
Sequence of returns risk is most acute in the fragile decade, the five years before and five years after retirement begins.
During this window, the portfolio is typically at its peak size. A severe market downturn can wipe out years of accumulated gains quickly. Unlike during the accumulation phase, there are no future contributions to average down the cost base. Once withdrawals begin, compounding shifts from working for you to working against you.
This is why a 30% market decline at age 35 and a 30% decline at age 63 are not equivalent events. At 35, you have decades of contributions and growth ahead. At 63, your portfolio has little time to recover before withdrawals begin.
Financial independence plans built on the 4% rule also face this risk. A particularly bad sequence of early returns can push a portfolio below the threshold needed to sustain withdrawals for 30 or more years, even if the long-run average return falls within historical norms.
Strategies to Reduce Sequence Risk
Sequence of returns risk cannot be eliminated, but it can be meaningfully managed.
Build a cash buffer
Holding one to two years of living expenses in cash or short-term fixed income means you do not need to sell equities during a market downturn to fund withdrawals, giving the portfolio time to recover.
Use a bucket strategy
Divide the portfolio into segments based on time horizon. Short-term funds are held in low-risk assets, medium-term in balanced assets, and long-term funds remain in growth assets. Withdrawals come from the short-term bucket first, leaving growth assets untouched during downturns.
Reduce equity exposure gradually
Shifting toward a more conservative allocation in the years approaching retirement reduces exposure during the fragile decade. This gradual transition is sometimes called a glide path.
Flexible withdrawal rates
Reducing withdrawals temporarily during market downturns is one of the most effective ways to preserve a portfolio through a bad sequence. Even a modest reduction in the early years of a downturn can significantly extend the portfolio's life.
Consider guaranteed income sources
Annuities, pensions, or other guaranteed income streams reduce dependence on the portfolio for essential expenses. When fixed costs are covered, withdrawals become more discretionary and can be reduced during poor market periods.
Example Scenario Comparison
Both investors retire with $500,000 and withdraw $25,000 per year. Both earn an average annual return of 6% over 20 years.
Investor A experiences poor returns in years 1 to 5, followed by strong returns in years 6 to 20.
Investor B experiences strong returns in years 1 to 15, followed by poor returns in years 16 to 20.
Despite identical average returns and identical withdrawals:
- Investor A runs out of money around year 18.
- Investor B still has approximately $320,000 remaining after 20 years.
The only difference is the order in which returns arrived. Investor A's early losses, combined with ongoing withdrawals, permanently depleted the portfolio before the good years could compensate.
Conclusion
Sequence of returns risk is one of the most underappreciated risks in long-term financial planning. The order in which returns occur, not just the average, determines whether a retirement portfolio survives or fails.
Managing retirement investment risk means protecting the portfolio during the fragile decade, reducing forced selling during downturns, and maintaining flexibility in withdrawal rates when markets are unfavorable. Understanding this risk before it arrives is the only way to protect against it effectively.
FAQ
What is sequence of returns risk?
It is the risk that poor investment returns early in the withdrawal phase will permanently damage a portfolio's ability to sustain long-term income, even if average returns over time are acceptable.
Why does sequence risk matter more in retirement?
Because withdrawals during a downturn permanently remove assets at depressed prices. Unlike during accumulation, there are no future contributions to offset the loss.
How can I reduce sequence of returns risk?
Common strategies include a cash buffer, bucket strategy, gradual equity reduction before retirement, flexible withdrawal rates, and guaranteed income sources to reduce portfolio dependence.
References
- Investopedia, How Sequence of Returns Risk Could Affect Your Retirement, 2026.
- Morningstar, Can you manage sequencing risk in retirement?, 2026.
