Every market cycle has its own gravity. In one, it pulls you toward optimism; in another, toward fear. The challenge for long-term investors has rarely been finding the next great idea. It has been refusing the bad ones the market keeps handing you with great confidence.

For the last three years, that gravity has been pulling in a particular direction — toward concentration, toward narrative, toward the comforting belief that a handful of remarkable companies will keep doing remarkable things forever. They might. But our job is not to bet on that. Our job is to build portfolios that work regardless of which story turns out to be true.

What we’re actually seeing

Three things, in plain language. First, market leadership is the narrowest it has been since the late 1990s — the top ten names in the S&P 500 now account for roughly 35% of the index. Second, valuations on those leaders are stretched on every metric that has ever mattered. Third, the remaining 490 companies are trading at multiples that, historically, have produced very respectable forward returns.

35% S&P 500 Concentration · Top 10
22× Forward P/E · Market Leaders
14× Forward P/E · Remaining 490

None of this is a forecast. It’s just the arithmetic. And the arithmetic, when it is this stark, has a way of asserting itself eventually — usually not on any schedule that would be convenient for someone trying to time it.

The temptation, and the trap

The temptation in moments like this is to do something dramatic — to lean hard into the names that have worked, or to bail out of equities altogether in anticipation of a reckoning. Both of these instincts are reasonable, and both of them are wrong for almost everyone who acts on them.

Discipline is not glamorous. It’s not supposed to be. It is the boring middle path that compounds.

Leaning in feels prudent because the trend has been your friend. It is, in fact, the single most common way long-term investors blow themselves up. By the time a story is obvious enough to chase, the easy money has been made and the asymmetry has flipped against you. Bailing out feels prudent because something has to give. It does — but on a timeline so unreliable that staying out of the market typically costs more than the correction you were waiting for.

What we’re doing instead

Three things, all of them boring on purpose.

One — we’re rebalancing. For clients whose equity allocation has drifted past their targets, we are quietly trimming back to plan. Not in a single grand gesture, but in measured, tax-aware moves over multiple quarters. The goal is not to predict a top. The goal is to make sure that, whatever happens next, the portfolio still reflects the financial plan we built together.

Two — we’re broadening exposure. Inside the equity allocation, we are tilting toward the parts of the market the index has all but forgotten — equal-weighted indices, mid-caps, and selective international exposure where valuations look more honest. Not because we know they will outperform, but because they are priced as if they will not, which is historically the better starting point.

Three — we’re building real cash reserves. Yields are finally paying you to wait. For retirees in particular, two to three years of expected withdrawals held in short-term Treasuries or a high-quality money market is no longer a drag on the plan. It is the thing that lets you ride out the noise without selling equities at the wrong time.

The behavioral piece

None of the above is technically difficult. The hard part is human. The hard part is doing it during a year when the headline indices keep printing new highs, and the financial press keeps making it sound as if anyone who isn’t all-in on the obvious trade is missing the obvious thing.

We are not in the business of being interesting. We are in the business of being right over thirty years, which usually requires being out of step with whatever feels right today.

That gap — between what feels right today and what is likely to be right over the next decade — is where almost all of the meaningful work in this profession happens. It is where the calls get made that you will be glad you made in 2031, even if they look unremarkable in 2026.

— A working assumption The next decade will probably look more like 2000–2010 than 2015–2025.

Not a forecast — a planning assumption. It is the conservative version of the future, the one we'd rather have prepared for and not needed than the other way around. Plans built to survive that decade tend to thrive in any other.

What this means for your plan

Most clients will not need to do anything dramatic. The rebalancing happens in the background. The tax-loss harvesting happens when the market gives us the opportunity. The reserves get built over the next two quarters, not the next two weeks.

But if you are in the years immediately around retirement, or if a large concentrated position has gotten significantly larger over the last two years, the calculus is different — and worth a conversation. The cost of being mechanically diversified into the right plan, well in advance of when you need it, is almost always lower than the cost of getting it perfectly right at the wrong moment.


If any of this resonates — or if it doesn’t, and you’d like to make the case for the other side — that is exactly the kind of conversation we are here for. The plan is supposed to handle weather we cannot predict. The point of revisiting it is to make sure it still does.

If your plan was built for a different market, let's revisit it.

A 30-minute call. No agenda, no obligation. The kind of conversation we're built for.

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About the author
Greg Yocum, CFP®, AIF®

Greg is the founder of Yocum Wealth, a boutique wealth management firm in Phoenix, Arizona. He has been advising individuals, families, executives and business owners since 1998, and previously co-founded a $1 billion registered investment advisory firm.