Guide·Updated October 20, 2026

Sequence-of-Returns Risk: Same Average, Very Different Retirement

Average returns don't pay the bills; the order they arrive in does. A bad first few years while you're withdrawing can do lasting damage. Here is the mechanism, and the defenses.

What Is Sequence-of-Returns Risk?

While you are only saving, the order of your returns does not matter: multiplication works in any order, so a crash in year one and a crash in year ten leave you with the same final balance. Once you start withdrawing, that stops being true. Money withdrawn after a fall is sold at low prices, and it is not there to benefit when the market recovers. Sequence-of-returns risk is the danger that poor returns arrive in the first years of withdrawals, permanently shrinking the portfolio even if long-run average returns turn out fine. It matters most for early retirees and FIRE plans with 40-year horizons, and for anyone drawing from a portfolio without a pension behind them.

A Worked Example: Same Average, Different Outcome

Take $1,000,000 and ten years of returns: −20%, −10%, 5%, 10%, 15%, 20%, 25%, 12%, 8%, 10%. The arithmetic average is 7.5%. Retiree A gets them in that order; Retiree B gets the exact reverse. With no withdrawals, both end at $1,908,702, identical to the dollar. Now withdraw $50,000 at the start of each year. Retiree A falls to $618,450 by the end of year three, where the same $50,000 is an 8.1% withdrawal rate, and finishes the decade at $956,546. Retiree B finishes at $1,313,872. Both withdrew the same $500,000 and earned the same returns. The order alone left them $357,326 apart.

Defense 1: A Cash Buffer

Keep one to three years of planned withdrawals in cash and short-term Treasuries. In a down year, spend from the buffer instead of selling stocks at depressed prices; in good years, refill it from gains. The buffer does not raise long-run returns, and holding cash costs something in strong markets. What it does is take forced selling at the bottom out of the plan, and it makes a bad stretch easier to sit through, which is often worth more than the arithmetic suggests. For a self-employed early retiree, a few years of part-time or consulting income can do the same job.

Defense 2: The Bond Tent

Sequence risk is concentrated in the years just before and after retirement, when the portfolio is largest and withdrawals are about to start. A bond tent raises the bond allocation going into retirement, then lets equities climb back up over the following decade. Wade Pfau and Michael Kitces tested this in the Journal of Financial Planning (January 2014) and found that a rising equity glide path, starting conservative at retirement and increasing stock exposure over time, can reduce both the probability and the magnitude of failure compared with holding a static allocation or reducing equities with age. It is counter-intuitive and well supported.

Defense 3: Guardrails and Flexible Withdrawals

The 4% rule traces back to William Bengen's 1994 study of historical returns, and it assumes withdrawals that rise with inflation regardless of markets. Real retirees can adjust. Jonathan Guyton and William Klinger's 2006 decision rules set guardrails: cut spending when the withdrawal rate drifts too far above its starting level, raise it when strong markets push the rate well below, and skip the inflation increase after a losing year. They found that initial withdrawal rates of 5.2% to 5.6% held up for portfolios with at least 65% equities. Flexibility is the cheapest defense: plan your essential spending and treat travel and other extras as the first thing to trim.

Put This Into Practice

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Frequently Asked Questions

When does sequence-of-returns risk matter most?

In roughly the five years before and after you start withdrawing. That is when the portfolio is largest and withdrawals are about to begin, so a market fall does the most permanent damage. It does not affect someone still saving, where the order of returns makes no difference to the final balance.

Does the 4% rule already account for sequence risk?

Partly. Bengen's 1994 study drew on historical periods that included bad sequences such as the late 1960s and early 1970s, which is why the rate is conservative. But it assumes fixed, inflation-adjusted withdrawals and a 30-year horizon. Longer early-retirement horizons and rigid spending leave less margin for error.

How big should a cash buffer be in retirement?

One to three years of planned portfolio withdrawals is the common range. Bigger buffers protect more but cost more in long-run growth. Size it to how long you could tolerate not selling stocks, and count reliable outside income, such as part-time work, toward it.

Is a bond tent the same as a target-date fund?

No. A typical target-date fund keeps reducing equities through retirement. A bond tent raises bonds only around the retirement date, then lets equities rise again, because the research shows the early withdrawal years are when protection matters most.

Sources

Limits and thresholds change every year. Confirm against the current publication.