Sequence of Returns Risk: Why the First 5 Years of Retirement Matter Most

A poor sequence of returns in the first five years of retirement can reduce a portfolio's success rate by a larger margin than an identical downturn occurring in year twenty-five.

Direct answer: Sequence-of-returns risk means the order of investment returns matters, not just the average — a downturn early in retirement, while withdrawals are being made, does far more lasting damage than the same downturn later.

Two retirees can experience the exact same average investment return over 30 years and end up with very different outcomes purely based on when the good and bad years occurred. If poor returns hit early, withdrawals are drawn from a shrinking portfolio at the worst possible time, permanently reducing the base available to recover during any later rebound.

This is the core finding behind why many retirement researchers, building on the original Trinity Study methodology, recommend testing a plan against actual historical sequences (including the worst historical starting years, such as those beginning near major market peaks) rather than relying only on a single average annual return assumption.

Two common mitigation strategies are a lower initial withdrawal rate (such as 3.25-3.5% instead of 4% for a longer retirement horizon) and a flexible spending approach that reduces withdrawals in down years, both of which soften the impact of an unlucky early sequence.

Because sequence risk is highest in the first 5-10 years of retirement, some early retirees keep a larger cash or bond buffer during that window specifically to avoid selling equities at depressed prices, even though this buffer earns less on average over the long run.

Frequently Asked Questions

What is sequence-of-returns risk in simple terms?

It's the risk that a bad run of investment returns early in retirement, while money is being withdrawn, causes lasting damage that a good long-term average return cannot fully repair.

How can retirees reduce sequence-of-returns risk?

Common approaches include using a more conservative withdrawal rate, keeping a cash buffer for early down years, and reducing withdrawals flexibly during market downturns.

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