In 2026, U.S. small-cap equities, as measured by the Russell 2000 index, have significantly outperformed the S&P 500. The Russell 2000 returned 20.1% year-to-date, surpassing the S&P 500 by 9.6 percentage points. The rotation away from mega-cap tech towards small-cap stocks began before most retail investors noticed, with the Russell 2000 outperforming the S&P 500 for a record 15 consecutive trading sessions in the first two months of 2026. This performance has caught the attention of institutional investors, who have been quietly rebalancing their portfolios, while retail investors pulled approximately $12 billion from small-cap ETFs in the year leading up to this rally.
Several factors contribute to the bullish outlook for small caps. Consensus estimates project headline earnings-per-share (EPS) growth of 50.7% for small caps in 2026 and 37.9% in 2027, significantly higher than the 24.0% and 15.8% expected for large caps, respectively. Additionally, small caps are trading at attractive valuations, with the Russell 2000's forward price-to-earnings (P/E) ratio at 17.69x compared to the S&P 500's 22x-plus multiple. This valuation differential is historically wide.
The broader macro environment also supports small caps, driven by robust economic activity, expectations of supply chain normalization, and broadening AI demand. Small caps, with a higher weighting in industrials (Russell 2000: 19.4% vs. S&P 500: 8.3%), are well-positioned to benefit from AI-driven business investment. Furthermore, the Federal Reserve's dovish remarks signaling potential interest rate cuts have been viewed positively for small caps, which are more sensitive to interest rate changes due to lower interest coverage (1.5x for small caps vs. 8.9x for large caps) and a greater share of floating-rate debt.
Despite the strong performance and favorable indicators, investors are cautioned about historical patterns of earnings disappointment in small caps. In the past three calendar years, final EPS outcomes for small caps were revised down by cumulative percentages of 22%, 40%, and 43% from initial estimates. However, more recent revisions for 2027 are showing more optimism. While the aggregate quality of small-cap indices has declined, this is partially attributed to index dilution rather than broad deterioration, and the AI tailwind is beginning to mitigate some concerns. The greater sensitivity to interest rates will require careful monitoring given ongoing uncertainties in central bank policies and geopolitical tensions.
