Small-cap companies, which have historically delivered higher returns than larger firms over extended periods, are showing signs of renewed investor interest after a lengthy phase of underperformance. Research dating back nearly a century, including the widely cited Fama-French studies, indicates that smaller firms tend to outperform their larger counterparts by around two percentage points annually over the long term. This performance gap is attributed to the greater agility and growth potential of smaller businesses, which can more rapidly expand market share or scale operations compared to more established companies.

However, small-cap investments come with heightened volatility and risk. While their value can multiply significantly, it can also decline sharply. Over the past decade, large-cap stocks have largely dominated, propelled by dominant technology giants such as Apple, Amazon, and Microsoft, alongside major players like Walmart and JP Morgan. From 2016 onwards, small-cap indices struggled to keep pace; the last year of notable outperformance was 2016 when global small caps rose 13 percent, outperforming large caps by five percentage points. Since then, small caps have underperformed on average, leading to a roughly 80 percent cumulative outperformance by large firms over the ten-year period.

The sustained dominance of mega-cap companies has led some to question whether structural changes—such as the ability of large technology firms to scale globally with unprecedented efficiency and the trend of promising startups remaining private longer or being acquired early—have permanently shifted the market dynamics. Nevertheless, the beginning of 2024 has witnessed a reversal of this trend, with small-cap stocks advancing approximately 17 percent, compared to an 8 percent gain for large caps, rekindling investor interest in smaller firms.

It is important to emphasize that “small cap” does not mean inconsequential or micro-sized companies. For example, the MSCI World Small Cap index, a broad representation of global smaller firms, includes companies averaging over $2 billion in market capitalization. Constituents range from biotechnology firms like Moderna and technology companies such as SanDisk to established names like Ralph Lauren, along with firms from diverse sectors including banking, manufacturing, and retail.

The cyclical nature of small-cap investing is notable, with historical patterns showing roughly decade-long phases of underperformance followed by extended periods of outperformance. Given the last period of underperformance began in 2016, some analysts suggest the current market environment may herald the start of a renewed decade of relative strength for smaller companies. This thesis is supported by valuation metrics; the MSCI World Small Cap index trades at a price-to-earnings ratio of about 18, markedly lower than the 25 ratio for large caps, suggesting greater value.

The broader economic backdrop is also supportive, with interest rates stabilizing, steady consumer spending, and increased government investment in sectors such as defense, energy infrastructure, and technology. Additionally, smaller companies may be well positioned to leverage advancements in artificial intelligence and other technologies driven by larger firms, which can rapidly improve operational efficiency and profitability in areas where resources have traditionally been stretched.

For investors seeking diversified exposure to smaller firms, exchange-traded funds like the iShares MSCI World Small Cap provide access to thousands of companies worldwide, balancing the risks inherent in individual stock selection.

While it remains possible that large-cap dominance could continue, historical trends and economic fundamentals suggest that smaller companies remain a meaningful component of long-term investment strategies, potentially entering a new phase of growth and outperformance.