Beyond mega‑caps: Why SMID stocks deserve another look

In recent years, a narrow group of mega‑cap companies has driven a disproportionate share of U.S. equity returns, pushing the S&P 500 Index to new highs. Yet market leadership has historically rotated, and many of tomorrow’s compounders begin their journey as small‑ and mid‑cap companies. Small‑ and mid‑cap, or SMID, companies typically sit earlier in their development cycles, with longer reinvestment runways and more room to expand margins, earnings, and cash flow. For investors whose portfolios are heavily concentrated in today’s index heavyweights, SMID exposure can reintroduce breadth, balance, and access to the next generation of leaders.

Finding tomorrow’s leaders beyond large‑caps

The case for looking beyond large‑ and mega‑caps appears to be strengthening. SMID companies are benefiting from a market environment that looks more balanced than it has in years.

On a forward price‑to‑earnings (P/E) basis, small‑ and mid‑cap companies currently trade at a notable discount to large‑caps. The gap in forward P/E ratios has widened over the past five years to levels well above the 20‑year average. Large‑cap valuations remain elevated versus their own history, while SMID valuations are closer to, or below, long‑term averages.

SMID earnings are also inflecting from a cyclical low. In TMSL, we focus on businesses where improving earnings are supported by durable competitive advantages and sound balance sheets. As shown in Figure 1, year‑over‑year earnings per share (EPS) growth estimates for SMID stocks have turned positive and are projected to outpace large‑cap stocks over the next several quarters. Supportive economic tailwinds—including potential interest rate cuts, reshoring initiatives, and infrastructure spending—tend to benefit domestically focused, operationally agile SMID businesses. This improving earnings momentum, off a depressed base, could position SMID stocks to participate more fully if market leadership broadens beyond the largest benchmark constituents.

History also offers valuable perspective. Large‑cap leadership can persist for long periods. When that leadership wanes, however, small‑ and mid‑cap stocks have historically experienced periods of meaningful outperformance relative to large‑caps. Understanding why that opportunity exists requires a closer look at how this part of the market works. That’s where T. Rowe Price’s combination of long‑tenured SMID specialists and centralized portfolio construction can help distinguish healthy market broadening from lower‑quality beta participation.

Taken together, valuation spreads, improving earnings expectations, and the potential for broader market leadership strengthen the case for SMID exposure. The opportunity, however, is not uniform, which makes quality and implementation critical.

Where active management makes a difference

What makes this segment of the market compelling for investors is not only valuation or earnings potential, but also the structure of the opportunity set itself—an environment where fundamental stock picking and research depth can be a real differentiator.

Small‑ and mid‑cap stocks typically receive less analyst coverage and investor attention than the largest U.S. companies. Among large‑cap stocks, new information is often widely disseminated and quickly reflected in prices. In the less efficiently covered SMID universe, fundamental research can be especially valuable when it helps distinguish temporary earnings recovery from durable improvement in business value.

As of March 31, 2026, the S&P 500 Index averaged 20.7 sell‑side analyst estimates per company. By comparison, the S&P SmallCap 600 Index averaged 7.3 estimates and the S&P MidCap 400 Index averaged 11.8. Lower coverage does not guarantee better investment outcomes, but it may create a broader opportunity for skilled active managers to identify mispriced businesses through fundamental research and stock selection. In TMSL, sector specialist research is combined with benchmark-aware portfolio construction so that stock selection—not factor bets—drives results over time.

Quality is another reason selectivity matters. As shown in Figure 4, the Russell 2000 Defensive Index has outperformed the Russell 2000 Index over full market cycles, underscoring the importance of focusing on stronger businesses within a highly dispersed opportunity set. This supports a broader point: quality can matter more when fundamentals vary widely across the opportunity set, and active management can help apply that selectivity.

While passive exposure can provide broad access to the SMID universe, it does not distinguish between durable businesses and more speculative companies. In this part of the market, balance sheet strength, cash generation, management execution, and earnings durability can vary widely. In TMSL, we focus on companies with stronger balance sheets, durable earnings power, and better long‑term fundamentals, even if that means being selective within the SMID benchmark.

Built for this market: How T. Rowe Price puts research to work

For investors who want exposure to this part of the market, the question is not only how much small‑ and mid‑cap exposure to own, but how best to access it.

TMSL is an active small‑ and mid‑cap ETF with flexibility across the style spectrum, anchored by a persistent emphasis on quality, improving earnings, and valuation discipline.

The portfolio is built from the bottom up, drawing on T. Rowe Price’s research platform to identify businesses with durable cash flows, high or rising returns on capital, strong margins, and sound balance sheets. The strategy is implemented in a diversified portfolio designed to adapt as fundamentals and market leadership evolve, with the goal of allowing high‑conviction positions to contribute meaningfully to returns.

The strategy is supported by a collaborative co‑portfolio manager structure, centralized portfolio construction, and disciplined risk oversight. Together, these elements help translate specialist research into a diversified, conviction‑driven ETF while keeping the portfolio aligned with its mandate, liquidity profile, and tax‑aware implementation goals.

That process is supported by more than 65 years of SMID investing experience, over $68 billion in SMID assets under management, and more than 1,000 small‑ and mid‑cap company meetings annually.

That research depth is important because the best opportunities in small‑ and mid‑cap stocks are not always obvious. Some may come from companies tied to major long‑term themes that operate outside the most crowded large‑cap names, including artificial intelligence (AI), digital infrastructure, and other areas of long‑term growth.

Within T. Rowe Price’s SMID research universe, many compelling ideas are not headline AI or mega‑cap growth stocks, but enabling businesses one or two layers behind those themes. Rambus, for example, provides semiconductor technology that helps data move faster and more securely inside servers and other computing systems. VIAVI Solutions provides testing and measurement equipment used to help communications networks and optical components operate reliably as AI‑related complexity grows. Vicor makes advanced power systems designed to convert and deliver electricity efficiently inside high‑performance computing equipment, including next‑generation data center systems. These examples illustrate how a research‑driven approach can identify companies connected to enabling technologies behind major long‑term themes, including AI infrastructure.

The point is not that every company tied to a long‑term theme will succeed. It is that a research‑driven approach may be better positioned to identify which businesses are building durable advantages and which ones are simply riding investor momentum. Taken together, the case for SMID exposure depends not only on the opportunity set, but on the ability to be selective within it.

The bottom line: A research‑driven way to access SMID opportunities

After a prolonged period of mega‑cap leadership, investors may want to reassess whether their portfolios have enough exposure to the broader opportunity set in small‑ and mid‑cap stocks. Valuations remain attractive relative to large‑caps, earnings expectations are improving, and market leadership has the potential to broaden. These are the kinds of environments—broadening leadership, improving earnings revisions, and wide quality dispersion—where a research‑driven SMID ETF like TMSL may be well positioned to add value. For investors seeking a disciplined, research‑backed way to access this segment, the T. Rowe Price Small‑Mid Cap ETF may offer active exposure to businesses with durable earnings power, strong fundamentals, and the potential to become future market leaders.