What is Sequence of Returns Risk?

Sequence of returns risk, often called sequence risk, is the hazard that the timing and order of market returns will negatively impact the overall longevity and value of a retirement portfolio. This risk is critical for retirees who have transitioned from the accumulation phase to the distribution phase, actively withdrawing capital to cover living expenses. If a portfolio experiences a severe market downturn in the years immediately preceding or following the start of retirement, the retiree is forced to sell depreciated assets to fund withdrawals. This locks in paper losses, leaving fewer assets in the portfolio to compound when the market eventually recovers.

Mathematically, the order of returns has no impact on a portfolio that is left untouched; the final compounding value will be identical regardless of whether the good years or bad years come first. However, once regular withdrawals are introduced, the sequence of returns becomes a critical factor. Even if two retirees experience the exact same average annual return over a 30-year retirement, the retiree who suffers poor market returns in the first five to ten years (the 'retirement red zone') will deplete their portfolio significantly faster compared to the retiree who enjoys a bull market early on and experiences market drops at the end of retirement.

To mitigate sequence of returns risk, retirees employ several portfolio management techniques. These include establishing a 'cash bucket' containing one to three years of living expenses in highly liquid cash equivalents, allowing them to pause equity sales during a market crash. Other strategies include dynamic spending rules (such as reducing withdrawals when the market declines), utilizing spending guardrails, maintaining a diversified asset allocation, or securing guaranteed income sources (like pensions or annuities) to cover baseline essential expenses.