How to build a portfolio you can actually stick with.
What if the markets turn against me? Most portfolios don't fail because the allocation was wrong. They fail because someone abandoned them in the one year that tested it.
What if the markets turn against me? is the question behind almost every conversation about portfolios, and it's rarely answered by talking about holdings.
You already have an investment strategy, whether you chose it or arrived at it by accumulation. It usually looks like this:
- A large balance in an old employer plan
- A taxable account holding whatever seemed sensible at the time
- A concentrated position from a job or an inheritance
- Something speculative, held for reasons that made sense once
That's an allocation. Nobody designed it.
The short answer. The portfolio you can hold through a bad year beats the one that looks better on paper. That means sizing risk to what you can actually live through, putting each asset in the account where it costs least in tax, and knowing in advance what you'd do if it fell by a third.
| Where returns leak | What it looks like | Visible on a statement? |
|---|---|---|
| Asset location | Income-generating holdings sitting in a taxable account | No |
| Unnecessary turnover | Gains realized in a year you did not need them | Only afterwards, on the tax return |
| Overlapping funds | Six holdings that own the same forty companies | No, they look diversified |
| Behavior | Selling in a decline, buying after a run | Never, and it is the largest of the four |
The IRS sets out how investment income and expenses are actually taxed in Publication 550, which is the document behind most of the first two rows.
What the allocation decision controls.
The split between growth assets and stable ones does most of the work. It sets the range of outcomes you're likely to experience, in both directions.
What it doesn't control is which year the bad outcome arrives. That matters enormously once you're withdrawing rather than contributing. The same average return, delivered in a different order, produces very different results for someone taking income, because you sold shares to live on while they were cheap.
Which means the right portfolio for someone drawing income isn't simply a more conservative version of the one that got them there. It's built around a different question: what has to be true for the plan to hold if the first five years go badly.
Risk tolerance isn't a questionnaire answer.
Every firm asks about risk tolerance, usually on a form, usually in a calm market. The answers are honest and not very predictive.
Three things actually determine whether you hold a portfolio:
- How much of a decline you can absorb without changing your life
- How much you can absorb without changing your mind
- How long before you need the money
The first and third are arithmetic. The second decides outcomes, and you can only estimate it from how someone has actually behaved.
A portfolio sized to the arithmetic but not to the temperament gets abandoned at the worst possible moment. That single event tends to cost more than any allocation decision.
Where returns quietly leak.
Two portfolios holding similar assets can deliver noticeably different results to their owners. The difference usually isn't selection.
Cost. Expense ratios, layered fees, trading costs, product wrappers that pay someone else. None of it is dramatic in one year. All of it compounds against you.
Tax drag. Which assets sit in which account. Holdings that generate ordinary income belong, where possible, in accounts that shelter it. Holdings that generate long term gains are more efficient in taxable accounts, where the preferential long term rate applies and they also become candidates for charitable giving, or for a step up in basis later, which resets their purchase price at death so the earlier growth is never taxed. Getting this backwards costs a fraction of a percent a year, indefinitely.
Concentration you didn't choose. A single position that grew into a third of the portfolio is a decision, even if nobody made it. Sometimes holding it is right. It should be a choice with a reason.
Activity for its own sake. Trading feels like diligence. In a taxable account it's frequently just realized gains and higher costs.
Diversification is about what you don't know.
Diversification isn't a way to raise returns, and it usually lowers them relative to whatever turns out to have been the best asset. That's the point. You hold a range of things because you can't know in advance which one will disappoint, and being concentrated in the wrong thing at the wrong time isn't recoverable.
It's the least satisfying idea in investing and the most durable. It requires owning things that underperform, every year, permanently. Anyone comfortable with that has already solved most of the problem.
What we're actually solving for.
Performance matters, and it's in service of something larger. A portfolio isn't graded against an index. It's graded against whether it funded the life it was built for.
That reframing changes the decisions. So we care more about the range of outcomes than the expected one. More about whether you can hold the position than whether it's theoretically efficient. More about how the portfolio meets your taxes and your income than about last quarter.
Nothing here sits on its own.
Where your assets sit affects your tax planning, which affects what you can convert, which affects what reaches your family. Your portfolio isn't a standalone decision, and treating it as one is how people end up with a technically fine allocation inside a poorly assembled plan.
We covered part of that in which account you should draw from first and tax planning. Who's doing that work matters as much as the portfolio itself, and so does the standard they're held to. An adviser who is a fiduciary is legally required to act in your best interest, which not everyone offering financial advice is. That's the subject of advisor or broker.
Five questions for your own portfolio.
- If this fell by a third, what would I do? Answer honestly, then check whether the portfolio assumes a different answer.
- What am I paying, all in, including inside the funds?
- Which of my holdings generate ordinary income, and are they in the right account?
- Is any single position large enough that its outcome changes my plan?
- What is this money for, and by when?
None of those require a market forecast, and most market news shouldn't change your answers anyway. All of them are answerable this week.
No two households arrive at the same portfolio, because no two are funding the same life. If you'd like an outside read on one you accumulated rather than designed, let's talk.
Investing involves risk, including the possible loss of principal, and nothing here is a recommendation for your circumstances.
Common questions.
- What actually drives portfolio returns?
- How much of the portfolio sits in stocks versus everything else drives the large majority of the variation in both the return and the discomfort. Fund selection operates at the margin by comparison. That is why building a portfolio is a design problem rather than a research problem: the best allocation on paper is worthless if you abandon it in a bad March.
- How do I know my real risk tolerance?
- Not from a questionnaire. A form asks how you would feel about a decline in the abstract, which is a different question from what you did the last time one happened. A better test is what you actually need the money to do, and what you would have to change if the portfolio fell by a third and stayed there for two years.
- Where do returns leak without anyone noticing?
- Four places. Asset location, meaning the same holdings in the wrong account types. Turnover that realizes gains you did not need to realize. Overlapping funds that look diversified while owning the same few dozen companies. And behavior, which is the largest of the four by a distance and appears on no fee schedule.
- What is asset location and does it matter?
- It is which account each holding sits in. Holdings that generate ordinary income belong in sheltered accounts where possible; holdings expected to produce long term gains are more efficient in taxable accounts, where they also become candidates for charitable giving or a step up in basis later. Nothing on a statement tells you when this is being done badly.
- Should I change the portfolio when markets fall?
- Usually not, and having decided in advance is what makes that possible. Markets fall substantially at unpredictable intervals because they always have, so a large decline is inside the assumption rather than outside it. The risk worth managing is not the decline; it is the decision made during one.
