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, roughly in order of impact:
- Flexible spending — reducing withdrawals by 10–15% during significant market declines dramatically improves long-run outcomes without requiring extreme austerity.
- Cash buffer — keep 1–2 years of expenses in a high-yield savings account; draw from it during downturns instead of selling investments.
- Bond tent — hold a higher allocation to bonds in the 5 years before and after retirement, then gradually shift back to equities over the following decade.
- Part-time income — even modest earned income in early retirement reduces portfolio withdrawal pressure significantly.
- Delay Social Security — deferring to 70 locks in a higher guaranteed monthly income that acts as a buffer against market volatility.
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.