Most people ask their portfolio one question: “How much will this grow?”
Run a projection, assume a reasonable return, done. But the better question is: “What happens when it doesn’t go according to plan?” That’s stress testing — not predicting the next crisis, but checking whether your plan survives one.
Think mission rehearsal, not weather forecast. You don’t plan assuming perfect conditions. You think through what happens if the weather turns, the aircraft has a problem, or the mission runs long. Stress testing does the same thing to your portfolio.
The basic version: a market decline. You retire with $2 million, the market drops 30%, now you’re looking at $1.4 million. Uncomfortable — but the real question isn’t “did I just lose $600K,” it’s “what does that do to my plan?” Pulling $80,000 a year from a shrunken portfolio is a very different problem than pulling $20,000 because a pension covers the rest until the market recovers.
This is why stress testing looks at the whole plan, not the account in isolation. A “risky” portfolio backed by a solid pension can be plenty resilient. A “conservative” one with no other income can still crack under pressure.
For military families, this matters more than most. A pension doesn’t care what the S&P did this year — it just shows up. Compare two retirees, both with $1.5M invested: one needs $90K/year entirely from the portfolio, the other needs $20K because a pension and Social Security cover the rest. Same market crash, wildly different amount of panic.
Then there’s sequence-of-returns risk — the retirement-planning equivalent of “it’s not the fall that kills you.” Two retirees can average the exact same 7% return over 20 years and end up in completely different places, depending on whether the bad years hit at the beginning or the end. Get hit early while you’re withdrawing, and you’re selling low to fund your lifestyle — locking in losses before the recovery even shows up. The average doesn’t tell you the story. The path does.
A real stress test asks the annoying questions: What if the market drops 20% right after you retire? 40%? What if inflation stays high for years? What if you live to 95? What if healthcare costs more than projected? What if your spouse outlives you by a decade? And — this is the important one — what if several of these happen at once? Risks rarely show up one at a time. A market crash plus a roof replacement plus a surprise medical bill is a very different year than any one of those alone.
How planners actually do this:
- Historical scenarios — model the plan against the Great Depression, the ’70s, 2008, COVID. Useful, but the next crisis is guaranteed to be rude enough not to copy the last one.
- Monte Carlo analysis — thousands of simulated futures to estimate a probability of success. An “85% success rate” doesn’t mean you personally have an 85% chance — it means 85% of the simulated versions of you made it. The assumptions behind it (returns, inflation, spending, lifespan) drive the number, so treat it as a decision-making tool, not a crystal ball.
The real value of stress testing isn’t a number — it’s finding the weak point before it becomes an emergency. Maybe the plan’s fine except if you retire into a bear market, which argues for a cash cushion. Maybe it only works if spending never wavers, which argues for spending guardrails instead of a fixed “paycheck” mentality. Maybe it only works if one spouse works until 65, which argues for saving more now.
It also answers a question people rarely ask directly: how much risk do you actually need? If the plan already succeeds comfortably, cranking up risk for a marginally bigger number may not be worth the downside. If it only works with aggressive returns, the real issue probably isn’t the portfolio — it’s the savings rate or the spending plan.
And the fix isn’t always “change the investments.” Sometimes it’s save more, work one more year, delay a purchase, or just realize the pension is doing more heavy lifting than you gave it credit for.
For military families, the separation-to-retirement window deserves its own stress test — active duty pay turning into pension income, a possible second career, a move, a new mortgage, a healthcare change, maybe a gap in employment. Stress testing checks whether you have enough liquidity to survive that transition without being forced to sell investments at the worst possible time.
Even the pension itself is worth stress testing — inflation, survivor benefits, taxes, and what happens if spending needs shift. If the household leans hard on the pension, know exactly what it does and doesn’t cover.
Inflation and taxes deserve the same treatment. Generic inflation numbers don’t account for the fact that healthcare and housing tend to rise faster than everything else — and a portfolio that looks sustainable pre-tax can look very different after RMDs, Roth withdrawals, and Social Security all collide on one tax return.
Ultimately, the payoff isn’t a number — it’s confidence. Knowing your plan survives a 30% drop doesn’t make watching it happen fun, but it makes it a lot easier to stay invested while everyone else is panic-selling. Knowing the pension covers the essentials means you’re not forced to sell in a downturn just to eat.
You can’t eliminate risk. You can’t predict the next crash, your lifespan, or next year’s inflation number. But you can build a plan flexible enough that you don’t have to.
So instead of just asking “what if I get average returns,” ask the harder ones: What if I retire right before a crash? What if I live to 95? What if healthcare costs more? What if I need to retire early?
Those aren’t pessimistic questions.
They’re planning questions.
Fight’s On!
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