Why is sequence of returns risk important in retirement withdrawal planning?

• A. It affects the sustainability of withdrawals depending on the order of returns early in retirement
• B. It affects only tax planning
• C. It has no impact if the portfolio is diversified
• D. It only matters for high-risk portfolios

Answer: (C)

Sequence of returns risk matters in retirement withdrawal planning because the order of investment returns can determine whether a portfolio can keep supporting withdrawals over time. If the early years of retirement bring negative or very low returns, the amount you can withdraw reduces the base on which future returns compound, making it harder for the portfolio to recover and potentially increasing the chance of depleting assets later, even if average returns over the whole period look decent.

Think of a simple example: start with one million dollars and plan to withdraw a fixed amount each year. If the first year earns a negative return, the portfolio drops before or after withdrawal (depending on timing), and you’ve already taken out money from a shrinking base. A later recovery hasn’t enough time to rebuild the balance before another withdrawal is needed. If instead those early years are strong, the base grows, and withdrawals are backed by a larger cushion. The difference in outcome is driven by the sequence of returns, not just the overall average return.

Diversification helps manage risk, but it doesn’t eliminate sequence of returns risk. Even a well-diversified portfolio can suffer from poor early-and-mid retirement returns in combination with withdrawals, whereas a portfolio with the same diversification but different return order can survive or fail differently. It’s not only about taxes or about high-risk portfolios; the timing of market performance relative to withdrawals directly affects sustainability.

Because of this, retirees use strategies to mitigate sequence risk, such as adjusting withdrawals based on market performance, using a bucket approach, delaying Social Security, or pairing investment choices with cash buffers to smooth withdrawals through different market environments.