Sequence of Returns Risk: Why the Order of Your Investment Gains and Losses Matters in Retirement

Two hypothetical retirees each invest $1,000,000 and withdraw the same amount every year for 30 years. Over that period, both portfolios earn an identical average annual return. Yet one retiree runs out of money in year 20 while the other finishes with a substantial balance. The difference is not luck in the ordinary sense; it is sequence of returns risk, and it is one of the most underappreciated hazards in retirement planning.

What Sequence of Returns Risk Actually Means

During the accumulation phase, when someone is saving and not withdrawing, the order of annual returns does not matter much. A portfolio that earns -10%, then +20%, ends up in the same place as one that earns +20%, then -10%, assuming no additions or withdrawals in between. Compounding is order-independent when cash is not moving in or out.

Retirement changes that math. Once a retiree begins taking regular withdrawals, losses that occur early force the sale of more shares (or a larger percentage of the remaining portfolio) to generate the same dollar income. Fewer shares remain to participate in any later recovery. A downturn that hits in year one or two of retirement can do outsized, sometimes irreversible, damage compared with the same downturn hitting in year 25, even if the long-run average return is unchanged.

Why the Early Years Matter Most

Financial planners sometimes refer to the five years before and the first five to ten years after retirement as a 'red zone' for this reason. A large portfolio has more dollars at risk in absolute terms right when someone stops adding new contributions and starts pulling money out. A market decline in that window can permanently reduce the base from which future withdrawals are drawn, even after markets recover, because withdrawals continued throughout the downturn.

By contrast, a downturn late in retirement, when the remaining time horizon and remaining withdrawal needs are shorter, tends to be less damaging to the plan's overall survival, all else equal.

Why Average Returns Can Be Misleading

Retirement projections sometimes use a single assumed average annual return to estimate how long savings will last. That approach can understate risk because it smooths over the variability that sequence risk depends on. Two portfolios can share the same arithmetic average return over 30 years and produce very different ending balances purely because of when the good and bad years occurred relative to the withdrawal schedule. This is one reason many financial planning tools now use Monte Carlo simulations, which model thousands of possible return sequences rather than a single average, to estimate the probability that savings last through retirement.

Approaches Used to Manage the Risk

There is no way to eliminate sequence of returns risk entirely, since no one can predict market timing. However, several structural approaches are commonly discussed by financial professionals to reduce its impact:

• Cash or short-term bond reserves: Holding one to three years of anticipated withdrawal needs in cash or short-duration instruments so that a market downturn does not force the sale of depressed equities to fund income.
• Bond ladders: Building a series of bonds maturing in successive years to cover near-term spending, reducing reliance on selling volatile assets on a schedule.
• Flexible withdrawal strategies: Adjusting withdrawal amounts based on portfolio performance in a given year, rather than a fixed percentage or fixed dollar amount that ignores market conditions.
• Reduced withdrawals after downturns: Some retirees and advisors use 'guardrail' strategies that cut spending temporarily following a significant market decline, then restore it once the portfolio recovers.
• Partial annuitization: Converting a portion of savings into an income annuity to cover essential expenses, which removes that portion of the portfolio from sequence risk entirely, in exchange for giving up liquidity and potential upside.
• Delaying retirement or phased retirement: Working part time or delaying full retirement can reduce the size and duration of withdrawals during a potentially adverse early sequence.

This article is for general educational purposes and does not constitute personalized investment, tax, or retirement advice. Retirement income strategies should be evaluated based on individual circumstances, ideally with a qualified financial planner, and in light of official guidance from resources such as the U.S. Social Security Administration and the Department of Labor's retirement planning materials.