Sequence of returns risk means the order in which you experience investment returns matters enormously when you're withdrawing money. Two retirees can have identical average returns over 30 years, but the one who experiences bad years first may run out of money while the other thrives.
Why? When you withdraw from a declining portfolio, you sell more shares to generate the same income. Those shares are permanently gone and can't participate in future recovery. It's the reverse of dollar-cost averaging — and it works against you.
This risk is highest in the first 5-10 years of retirement, often called the "retirement red zone."
