If there’s one fundamental takeaway that’s been drawn from the research on safe withdrawal rates, it’s the fact that market volatility really matters during the retiree withdrawal years. Even when long-term returns average out in the end, if the sequence of volatile returns is unfavorable, there is a danger that ongoing distributions during the “bad” years early on could deplete the portfolio before the “good” years ever show up.
As a result, many advisors and their clients use strategies that will avoid taking distributions from asset classes like equities during down years – for instance, setting aside “buckets” as a reserve against market crashes, and/or creating a series of “decision rules” that might simply state outright that equities will only be sold if they’re up, otherwise bonds are liquidated instead, and cash/Treasury bills will be used if everything else is down at once.
Yet when such a decision-rules strategy is paired with simple rebalancing, it turns out that the outcome is no better than merely managing the portfolio on a total return basis without the decision rules at all! The key, as it turns out, is that rebalancing alone already has an astonishingly powerful effect to help avoid unfavorable liquidations, as the process systematically ensures that the investments that are up (the most) are sold, and the ones that are down (the most) are actually bought instead! Which means in the end, we may not be giving rebalancing nearly the credit it deserves to accomplish similar – or even better – results than buckets and decision rules alone, and that such approaches are better purposed as explanatory tools for clients than actual systems for generating cash flows in retirement!
