In this article, we’ll explore…
- Why the dominance of mega-cap stocks may be nearing an inflection point.
- What historical market cycles suggest about shifts in leadership.
- The hidden risks of concentrated exposure in passive portfolios.
- How a flexible, cap-agnostic approach can position investors for what’s next.
It was a powerful trend. And like many powerful trends, it may be setting the stage for its own reversal.
At CooksonPeirce, we believe the evidence increasingly points toward a meaningful rotation in market leadership. We call this the Great Reversion, and we think it has significant implications for how advisors and investors should be thinking about portfolio construction right now.
what the numbers are telling us
Market leadership does not stay fixed. Our analysis of historical market data suggests that extended periods of narrow concentration have tended to give way to broader participation — including the years following the dot-com era, when smaller and mid-sized companies reclaimed significant ground relative to large caps. (Source: Bloomberg)We believe a similar dynamic may be unfolding today.
We believe several conditions that have historically preceded rotations are present in the current environment. By many conventional measures, valuations among the largest U.S. companies remain elevated relative to historical norms, while small and mid-cap equities appear to trade near their own historical averages. (Source: J.P. Morgan Asset Management, Guide to the Markets, U.S., as of January 30, 2026).
Consensus earnings growth expectations have been broadening beyond the mega-cap tier, with small and mid-cap companies projected to outpace large-cap earnings growth in 2026. (Source: FactSet consensus estimates, as cited in J.P. Morgan Asset Management, Guide to the Markets, U.S., as of January 30, 2026). And the macroeconomic backdrop, including fiscal policy, interest rate normalization, and a shift in capital expenditure toward domestic infrastructure and manufacturing, has historically been associated with stronger performance from companies outside the largest cap tier, though past patterns are not a guarantee of future results.
We believe we may be in the early innings of a rotation that rewards investors willing to look beyond the names that have dominated the last decade.
WHy concentration carries hidden risk
One of the underappreciated risks of the past decade is how much passive index investing has amplified mega-cap concentration. When assets flow into broad market index funds, they flow disproportionately into the largest companies by market cap, which can reinforce existing trends and push valuations in those names higher independent of underlying fundamentals. We believe this dynamic has contributed to elevated concentration risk in many portfolios that appear diversified on the surface.
Should sentiment shift or fundamentals disappoint in those concentrated names, history suggests the unwind can be swift. Investors who believe they own a diversified portfolio may discover they have significant exposure to a relatively small number of companies.
THE case for a cap-agnostic approach
We believe the advisors and investors best positioned for what comes next are those who are not artificially anchored to a specific market cap tier. A strategy that is free to follow momentum and relative strength signals across the full cap spectrum can participate in a rotation as it develops, rather than waiting for it to show up in a benchmark.
This is central to how CooksonPeirce manages the All Cap Equity strategy. We do not start with a mandate to own large caps, small caps, or any cap. We start with the data. Our proprietary process seeks to identify compelling trends across the entire investable universe and construct a focused portfolio around them. When leadership shifts, our process is designed to shift with it.
what this means for your portfolio
If the Great Reversion thesis is directionally correct, the next several years may look very different from the last several. Advisors who have built portfolios heavily weighted toward mega-cap passive exposure may find that approach less rewarding going forward than it has been in the recent past.
That does not mean abandoning passive strategies entirely. We believe a thoughtful portfolio can use passive exposure as a stable core while allocating a satellite sleeve to an active manager with the flexibility to pursue leadership wherever it emerges.
We have been developing this thesis in detail and recently published a white paper outlining the full case, the historical data behind it, and the portfolio implications for advisors. We would welcome the chance to walk through it.
Disclosure:
This material is for informational purposes only and should not be construed as investment, tax, or legal advice. Investment advisory services are offered through CooksonPeirce, a registered investment adviser. Investments involve risk, including possible loss of principal.
about cooksonpeirce
CooksonPeirce is a Pittsburgh-based, 100% employee-owned registered investment adviser founded in 1984. We manage the All Cap Equity strategy for individual investors and financial advisors seeking a disciplined, momentum-driven approach to active equity management. Assets under management exceed $2.5 billion.
Materials discussed are meant for informational purposes only and are not to be construed as investment, tax, or legal advice. Past performance is not indicative of future results. The views expressed represent the opinions of CooksonPeirce and are subject to change. Please refer to CooksonPeirce’s Form ADV for full disclosures.
