U.S. Micro-Cap Equities: The Overlooked Corner of the Market

What Are Micro-Cap Equities?

Micro-cap equities are the smallest publicly traded companies in the U.S. stock market. They typically have market capitalizations under $300 million, often sitting below the radar of analysts and large institutional investors. The Russell Microcap Index covers about 2,000 of these stocks, representing the bottom slice of the U.S. equity universe. Despite their small size, they account for over 40% of all U.S. public companies.

Because they are under-researched, less liquid, and more volatile, micro-caps often trade at a discount to larger peers. This neglect creates both risk and opportunity. For investors willing to dig deeper, micro-cap equities can add a unique growth and diversification element to a portfolio.

The Case for Paying Attention to Micro-Caps

1. Valuations Are Attractive

Micro-cap equities currently trade at deep discounts compared to large and mid-cap stocks. The S&P 500 trades at around 25 times earnings, while the Russell Microcap sits closer to 13 times earnings (excluding firms with negative earnings). On an enterprise value-to-EBITDA basis, micro-caps also price well below private equity deals, sometimes by 35% or more.

2. Under-Owned and Under-Covered

Roughly three-quarters of micro-cap companies have three or fewer analysts covering them. Institutional ownership sits at around 40% of the market, compared to 78% for small caps. This lack of attention means that many micro-cap firms trade at valuations that don’t fully reflect their fundamentals. It also creates opportunities for skilled managers to uncover mispriced “hidden gems.”

3. Potential for Private-Equity-Like Returns

Historical research shows that broad micro-cap portfolios have delivered returns comparable to private equity, but with far greater liquidity. From 1995 to 2020, equal-weighted micro-cap strategies returned about 740%, versus 716% for private equity funds over the same period. Investors get the small-company growth premium without locking money away in illiquid deals.

Risks Investors Must Understand

Micro-cap equities come with unique risks that must be respected:

• Volatility: Micro-caps swing harder than small or large caps. The Russell Microcap Index gained over 20% in 2019 and 2020, but dropped nearly 22% in 2022.
• Liquidity: Many micro-caps trade in low volumes. Bid-ask spreads can be wide, and selling a position in a downturn may take time.
• Quality Gaps: A large share of micro-caps are unprofitable or carry high leverage. Without screening for quality, investors can end up with “junk” companies that drag down returns.
• Idiosyncratic Risk: Because these are small businesses, company-specific issues like leadership turnover or a failed product launch can have outsized impact.
• Fraud and Governance Concerns: Thin regulation and less visibility make micro-caps more vulnerable to pump-and-dump schemes or weak financial reporting. Due diligence is non-negotiable.

How Micro-Caps Behave in Portfolios

Diversification

Micro-caps are highly correlated with other U.S. equities, but they tend to decouple from large caps during certain parts of the cycle. They also show near-zero correlation with bonds, making them a potential diversifier within an equity sleeve.

Sensitivity to the Economy

Micro-caps rely heavily on U.S. domestic growth. Rising rates, tight credit, or recessions hit them harder than larger companies. Conversely, when growth and consumer demand pick up, they can rally strongly.

Sector Exposure

Micro-caps are concentrated in sectors like healthcare (especially biotech) and regional banks. Sector swings matter more than they do in larger indexes. For example, a surge in biotech approvals or a recovery in small banks can boost micro-cap indexes significantly.

Scenarios for Returns

Analysts see three broad scenarios for micro-cap performance over the next three years:

• Bullish Case: Requires lower interest rates, stronger-than-expected U.S. growth, and valuation catch-up. Active managers could achieve double-digit compounding in this environment.
• Base Case: Most likely outcome. Modest growth, gradual Fed rate cuts, and some valuation improvement. Returns in line with long-term small-cap history.
• Bearish Case: Inflation stays sticky, growth slows, or credit tightens. Micro-caps underperform, struggling to keep pace with large caps.

Most forecasts assign the highest probability to the base case. The return target aligns with the bullish scenario but should be seen as an upside possibility rather than a baseline expectation.

Comparison to Other Asset Classes

• Versus Large Caps: Micro-caps lack exposure to mega-cap tech, which has driven recent S&P 500 performance. But their lower valuations suggest higher forward return potential if economic conditions improve.
• Versus Small Caps: Micro-caps are essentially small-cap equities on steroids. They offer similar long-term return potential with higher volatility.
• Versus Private Equity: Micro-caps deliver similar returns historically but with daily liquidity. For investors seeking growth, they can serve as a more flexible alternative.

Who Should Consider Micro-Cap Equities?

Micro-caps are not for everyone. They make sense for investors who:

• Already have a diversified core portfolio of large and mid-cap equities.
• Are comfortable with volatility and longer holding periods.
• Want exposure to inefficiencies where active managers can add value.
• Are looking to add a growth-tilted slice to their portfolio.

For retirees, micro-caps can still play a role as a satellite holding, balanced with a cash wedge or more stable income assets. For wealth-builders, they can be an engine of growth if managed carefully.

Practical Allocation

A modest allocation — typically 2–5% of an overall portfolio — is a reasonable starting point. Too much concentration in micro-caps can expose investors to outsized risk. Because passive micro-cap indexes include many low-quality firms, an active or screened approach is often preferable. Broad diversification across dozens of names reduces single-stock risk.

Final Word

U.S. micro-cap equities are undervalued, under-owned, and carry potential for strong returns. They also come with higher volatility and liquidity risks. For investors who approach them with discipline, they can be a powerful complement to a diversified portfolio.

If you’re curious how micro-caps might fit into your financial picture, start with an Investment Snapshot at franzvickerson.ca/investmentplanning. It’s a simple way to see how different asset classes, including micro-caps, could support your retirement income or long-term wealth-building goals.