Market risk & sequence of returns
The market doesn't have to be bad for long to hurt you. It just has to be bad at the wrong moment — and the wrong moment is the day you stop working.
Sequence-of-returns risk is the danger of poor markets early in retirement. A crash while you're withdrawing from a portfolio at its peak size locks in losses that later recoveries can't fully repair — because you sold shares at the bottom to buy groceries. The same crash ten years later, on a smaller balance you're withdrawing less from proportionally, is a bruise instead of a wound.
Why early losses are different
While you're saving, a crash is actually a discount — your contributions buy cheap shares that recover. The day withdrawals begin, the arithmetic flips: every dollar you withdraw in a down market is shares sold at the bottom, permanently removed from the recovery. Two retirements with identical average returns can end $1M apart purely because of the order the returns arrived in. This is the single biggest reason one projection lies and 6,000 tell the truth.
The defenses that actually work
- A cash buffer. One to two years of spending in cash or short-term bonds means a crash year is a year you don't sell stocks. It's the cheapest insurance in retirement planning.
- Flexible spending (guardrails). The Guyton-Klinger approach: trim spending modestly when the portfolio falls behind, spend more when it runs ahead. Small, temporary cuts in bad years buy dramatic improvements in survival odds — this is what turns a simulated "failure" into a real-life inconvenience.
- A glide path. Gradually shifting from stocks toward bonds as retirement approaches, so the years of maximum vulnerability are also the years of minimum exposure. (Many planners then let equity drift back up later, when sequence risk has passed.)
- A tested plan. Not a defense by itself — but knowing your plan survives 2008 changes what you do when the next 2008 arrives: nothing. Panic selling is the failure mode; evidence is the antidote.
The 4% rule, in one paragraph: the classic guideline says withdrawing 4% of your starting portfolio (inflation-adjusted each year) historically survived 30-year retirements — including ones that began right before crashes. It's a useful sanity check, not a law: longer retirements, higher fees, or rigid spending argue for less; flexibility and Social Security argue you can afford more. Vundii's simulations effectively personalize this number for your actual plan.
What Vundii shows you
- The Stress Test page replays history's worst openings against your plan: retiring into 2008 (−38% year one), the 1970s stagflation decade, the dot-com bust's three straight down years, even the Great Depression. Green cards survive; red cards show where the plan breaks. The goal isn't passing everything — it's knowing where you're vulnerable.
- The Projections page's Guyton-Klinger section shows what flexible spending does to your success rate — usually the most encouraging chart in the app.
- The Balances page shows your glide path — how your stock/bond mix shifts through time, if you've configured one.
What to do about it
- Run the Stress Test. If your plan survives 2008-at-retirement, most ordinary volatility becomes noise you can ignore.
- Failing multiple scenarios? The levers, in rough order of impact: spend less / flex spending, hold 1–2 years of cash near retirement date, retire slightly later, save more now.
- Turn on Guyton-Klinger in Projections to see what a flexible version of you achieves — then decide if you could actually live that flexibility.
- Within five years of retiring? Check your equity % — this is the window where de-risking earns its keep.
Related terms: sequence risk · stress test · Guyton-Klinger · glide path · safe withdrawal rate
Would your plan have survived 2008? Find out.
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