News•Apr 8, 2026
Creating A Flexible Retirement Date ‘Window’ To Mitigate Sequence And Cohort Risk
Georgios Argyris of bellavia.app argues that treating the retirement date as a fixed assumption overlooks a major source of risk. By allowing a two‑year flexibility window, historical analysis shows a median portfolio value gap of roughly two‑thirds between the best and worst timing choices. Cohort risk— the overall market environment—accounts for about 75% of outcome variability, while pure sequence risk contributes only 25%. Consequently, retirees who stick to their original date hit the optimal market environment only about 15% of the time, making timing adjustments a powerful lever for advisors.
