What is sequence of returns risk?
Sequence of returns risk is the danger that a major market decline early in retirement will permanently damage a portfolio — even if long-run average returns are perfectly fine. Two retirees with identical average returns over 30 years can have completely different outcomes if the bad years happen early for one and late for the other.
The mechanism: when markets fall and you are still withdrawing money for living expenses, you are forced to sell assets at low prices. That reduces the number of shares available to recover when markets rebound. The portfolio never fully participates in the recovery.
A concrete example
Imagine a $1,000,000 portfolio with a 4% ($40,000) annual withdrawal. Scenario A sees -30% in year one, then steady 7% returns. Scenario B sees steady 7% returns, then -30% in year fifteen. The average return over 30 years is nearly identical — but Scenario A typically depletes the portfolio 8–12 years earlier because the early crash happened when the portfolio was at its largest and the withdrawals represented a larger fraction of remaining assets.
Why early retirees face higher exposure
Traditional retirees at 65 with a 30-year horizon face meaningful sequence risk. Early retirees at 40 with a 50-year horizon face it even more acutely — they have more years of withdrawals ahead of them and their portfolio needs to survive through multiple market cycles.
Strategies to reduce sequence risk
The most effective strategies: build a cash buffer of 1–2 years of expenses in a high-yield savings account. In a severe market decline, draw from cash instead of selling investments. This gives the portfolio 1–2 years to recover before you resume withdrawals.
A bond tent is another approach: hold a higher allocation to bonds in the 5 years before and after retirement, then gradually shift back to equities over the following decade. This smooths returns at the most vulnerable period while maintaining long-run growth.
Flexible spending is probably the most powerful tool. If you can reduce withdrawals by 10–15% during a significant market decline — even temporarily — it dramatically improves long-run outcomes. This does not require extreme austerity: modest spending cuts in bad years give the portfolio meaningful room to recover.
How Monte Carlo simulation addresses sequence risk
A single-scenario projection assumes average returns every year — it misses sequence risk entirely. Monte Carlo simulation runs thousands of scenarios with different return sequences and reports what percentage of outcomes leave money remaining. A retirement plan with a 90%+ success rate in Monte Carlo simulation has accounted for sequence risk, whereas a plan that only shows average returns has not.