Sequence of returns risk describes how the timing of investment gains and losses — not just the average return — determines whether a retirement portfolio survives or fails. It only applies when you're withdrawing money, not accumulating it.
The Example That Makes It Click
Retiree A: Market drops 30% in year 1, then averages 8% for 29 years. Retiree B: Market gains 8% for 29 years, then drops 30% in year 30. Both see identical average returns. But Retiree A is selling shares at depressed prices when withdrawals are largest (early retirement, before portfolio can recover). Retiree B's portfolio has had 29 years to grow before the crash. Retiree A may run out of money. Retiree B barely notices.
Why It Only Matters in Retirement
During accumulation, a market crash means you buy more shares at lower prices (dollar-cost averaging works in your favor). During withdrawal, a crash means you sell more shares at lower prices to meet withdrawal needs — permanently destroying portfolio value. This asymmetry is sequence of returns risk.
4 Strategies to Reduce This Risk
- •Cash buffer: Hold 1–2 years of expenses in cash or short-term bonds — draw from here during down markets so you're not forced to sell equities at a loss
- •Flexible withdrawals: Reduce spending by 10–20% in down market years — even temporary cuts dramatically improve portfolio survival
- •Bond tent: Temporarily over-weight bonds 5 years before and after retirement, then gradually shift back to equities as risk window passes
- •Bucket strategy: 3 buckets — cash (years 1–2), bonds (years 3–7), stocks (8+ years) — replenish front buckets from back when markets are up
The 4% rule already partially accounts for sequence risk — it was designed to survive a 30-year retirement including the Great Depression and 1966 stagflation. But if you retire at 55 for a 40+ year retirement, consider 3.5% withdrawal to add a buffer.
The most dangerous retirement scenario: retiring right before a major bear market with no cash buffer and no flexibility in spending. The safest: retire with 1–2 years of cash, willingness to temporarily reduce withdrawals, and a portfolio that can recover.