Sequence of Returns Risk: Why the First 5 Years Matter

Imagine two people, both retiring at 65 with $1 million saved. Call them Helen and Ray. They invest in identical portfolios that deliver an identical average annual return of 6% over 20 years. By any traditional measure, they should end up in roughly the same place. But Helen retires into a strong bull market in her early years, while Ray retires just as a significant downturn begins. Two decades later, Helen's portfolio is thriving. Ray ran out of money years earlier.

Same nest egg. Same average return. Wildly different results. This is the essence of sequence of returns risk, and it is one of the most important concepts anyone approaching retirement can understand. It explains why retiring in a down market is genuinely more dangerous than retiring in a strong one, even if the long-run average ends up identical. And it explains why the first five years of retirement carry so much weight.

Sequence of returns risk, sometimes called sequence risk, refers to the danger that the timing of negative investment returns, particularly early in retirement, can permanently reduce a portfolio's longevity, even when the long-term average return is perfectly respectable.

During the accumulation phase, when you are saving and not yet withdrawing, sequence of returns risk is relatively minor. A bad year early in your career is actually an opportunity: you buy more shares at lower prices. Your future contributions benefit from the recovery. Time is on your side.

Retirement flips this dynamic entirely. Once you begin making regular withdrawals to cover living expenses, a market decline forces you to sell shares at depressed prices. Those sold shares are gone. They cannot participate in the eventual recovery. The portfolio shrinks faster than the math of average returns would suggest, and the hole becomes very difficult to climb out of.

Think of it like a road trip with a slow puncture. If the puncture happens near the end of the journey, you probably make it home. If it happens at mile one, you might be stranded before you even reach the highway.

To see sequence risk in action, consider two hypothetical retirees, each starting with $1,000,000 and withdrawing $50,000 per year (a 5% initial withdrawal rate). Both experience the same six annual returns over a simplified six-year window, just in reverse order. These are illustrative figures for educational purposes only.

Portfolio A (Good Years First):
Year 1: +20% | Year 2: +15% | Year 3: +10% | Year 4: -10% | Year 5: -15% | Year 6: -20%

Portfolio B (Bad Years First):
Year 1: -20% | Year 2: -15% | Year 3: -10% | Year 4: +10% | Year 5: +15% | Year 6: +20%

The average annual return across those six years is identical for both portfolios. But here is what happens when you model withdrawals:

• Portfolio A ends year 6 in significantly better shape. The early gains built a larger base, and withdrawals in the down years came from a cushion that had already grown.
• Portfolio B is in serious trouble by year 6. The early losses, combined with $50,000 annual withdrawals, mean the portfolio sold far more shares at the worst possible time. The recovery years that followed simply did not have enough capital left to work with.

This is the mathematical reality of sequence risk. Averages are calculated on the whole sequence; your portfolio balance is affected by the order. A sequence of returns calculator that models different orderings can reveal just how wide this gap can become over a 20- or 30-year retirement. Understanding this gap is also central to stress-testing your retirement plan against a downturn before it happens.

Research on retirement sustainability consistently points to the early years of retirement as the period of greatest vulnerability. There are two compounding reasons for this.

1. The portfolio is at its largest. On day one of retirement, assuming you have saved diligently, your portfolio is at or near its peak balance. A 20% decline in year one is not a 20% decline on a small balance. It is a 20% decline on the entire nest egg you spent decades building. The dollar loss is at its maximum.

2. Losses early in retirement have the longest time to compound negatively. A dollar lost in year one of a 30-year retirement is a dollar that cannot compound for 29 years. That same dollar lost in year 25 only misses four years of potential growth. Early losses are structurally more damaging because of the time horizon over which they ripple forward.

Some financial planning literature refers to the roughly five-year window around retirement, two to three years before and two to three years after, as the "fragile decade." It is the period during which a major market downturn can cause permanent damage that a portfolio simply cannot recover from, even if markets eventually rebound strongly. This is also why withdrawal strategies in early retirement deserve more nuance than a single fixed percentage rule can offer.

Sequence of returns risk cannot be eliminated, but it is a known risk that retirement planners and researchers have studied extensively. Several approaches are commonly discussed as ways to reduce a portfolio's exposure to a bad sequence in the early years. Each involves trade-offs, and what works in one person's situation may not suit another. A qualified financial adviser can help you think through which considerations are most relevant to your circumstances.

1. Cash Buffer or Bucket Strategy
One widely discussed idea is holding one to three years of living expenses in cash or very short-term instruments, separate from the invested portfolio. The logic is straightforward: if markets drop sharply, withdrawals can come from the cash reserve rather than from a depressed portfolio. This gives equity holdings time to potentially recover before more shares need to be sold. The trade-off is that cash earns very little compared to invested assets, which creates a drag on long-term returns in exchange for short-term stability.

2. Flexible Spending Approaches
Rather than taking a fixed dollar withdrawal each year regardless of market conditions, some retirees explore variable spending frameworks. These might involve spending somewhat less in years when the portfolio has declined and somewhat more in strong years. This approach requires a degree of lifestyle flexibility, the ability to reduce discretionary spending when markets are down. For retirees with meaningful fixed expenses, it may be difficult to implement fully, but even modest adjustments can make a measurable difference to portfolio longevity.

3. The Bond Tent (or Rising Equity Glidepath)
This concept, discussed in retirement research circles, involves holding a higher allocation to bonds and stable assets in the years immediately around retirement, then gradually shifting back toward equities in later retirement. The idea is to reduce the portfolio's vulnerability to a severe early-retirement decline by holding more of the portfolio in less volatile assets during the fragile window. Critics of this approach point out that it may reduce long-term growth potential. Proponents argue the protection against sequence risk in the early years is worth the trade-off. This is the kind of approach that benefits from careful personal modelling, not a one-size-fits-all answer.

4. Delaying Retirement or Part-Time Income
Working even one or two additional years, or generating modest income in early retirement through part-time work or consulting, can meaningfully reduce the annual withdrawal rate during the most vulnerable period. Lower withdrawals mean fewer shares sold during a downturn. This option is not available or appealing to everyone, but its mathematical impact on sequence risk is significant.

5. Optimising Social Security Timing
Delaying Social Security benefits past full retirement age (between 66 and 67, depending on your birth year) increases your monthly benefit by approximately 8% per year, up to age 70 (Social Security Administration). For retirees who can use portfolio assets to bridge the gap, a delayed claim creates a larger guaranteed income floor, which reduces the portfolio withdrawal rate during the years when sequence risk is highest. Understanding when to claim Social Security is a key piece of the sequence risk puzzle that is often overlooked.

"As long as my average return is good, I'll be fine."
This is the central misconception sequence risk exists to correct. Average returns tell you nothing about the order in which those returns arrived. Two portfolios with identical averages can produce dramatically different outcomes once withdrawals begin. Running scenarios with different return sequences, not just averages, gives a much more honest picture of retirement sustainability.

"I'll just ride out any downturn like I did during my working years."
During accumulation, riding out a downturn is usually the right instinct. During withdrawals, the maths changes. Selling shares to meet expenses during a downturn is not the same as staying invested and waiting for recovery. The shares sold are gone. Patience alone does not undo the compounding effect of selling low.

"Bonds are boring, so I'll stay mostly in stocks for the growth."
A heavy equity allocation may well outperform over a 30-year retirement on average. But it also maximises exposure to sequence risk in the early years. The question is not just what maximises average growth, it is what level of early-year volatility a particular retirement plan can absorb without becoming unsustainable. That answer depends on spending needs, other income sources, and personal risk tolerance, not a universal rule.

It's also worth noting that sequence risk interacts with inflation risk. If markets drop and inflation rises simultaneously, the real purchasing power of withdrawals is being eroded on two fronts at once. Exploring inflation-resistant assets like TIPS and I Bonds is one area some retirees research as part of a broader income strategy.

This article is provided for general educational purposes only and does not constitute personalised financial, investment, or tax advice. Retirement planning involves complex, individual circumstances that vary from person to person. Fidser. is not a registered investment adviser, financial planner, or fiduciary. Before making any decisions about your retirement income, withdrawal strategy, asset allocation, or related financial matters, consult a qualified and licensed financial adviser who can assess your specific situation.