Small & Midcaps: powerful lever in a shifting monetary environment

• Stéphanie Rheinboldt
  Senior Equity Analyst
  Banque Heritage

The universe of small and mid-cap equities (SMID) stands at a crossroads. Despite prolonged underperformance relative to large-cap stocks, exacerbated by rising interest rates, macroeconomic signals and historically attractive valuations point to significant rebound potential. That said, the trajectory of the SMID segment remains closely tied to the economic scenario ahead.

For several years, SMID stocks have lagged large-cap peers. This divergence is largely explained by the greater sensitivity of small and mid-sized companies to the cost of capital. More reliant on bank financing and floating-rate debt than large caps, SMEs have been directly penalised by the rapid rise in interest rates, which has weighed on both margins and valuations.

This pressure has resulted in historically wide valuation discounts. In the euro area, for example, small caps are currently trading at a discount to large caps, whereas they have historically commanded a valuation premium over the past 20 years. In the United States, the Russell 2000 index is also considered attractively valued on metrics such as price-to-book, well below both its historical average and that of the S&P 500.

The asymmetry is therefore clear. A credible disinflation trend and the onset of rate cuts would generate substantial operating leverage for SMID returns. Historically, small-cap performance has often been disproportionately strong in the 12 to 24 months following the end of a rate-hiking cycle.

Flow analysis confirms investor caution and further reinforces the catch-up potential. In the United States, large-cap ETFs continue to attract tens of billions of dollars, while US small-cap ETFs have experienced persistent net outflows, estimated at approximately USD 16 billion in 2025 according to available data.

This divergence is telling. The SMID segment is under-owned and largely neglected. Historically, such configurations create fertile ground for sharp rebounds once monetary visibility improves and capital flows begin to rotate. Beyond the monetary cycle, several structural factors support the case for sustained SMID outperformance. With greater exposure to domestic economies and a higher weighting in cyclical sectors such as industrials and materials, SMEs are among the primary beneficiaries of a recovery in capital expenditure and near-shoring trends. This phenomenon represents a powerful growth driver for North American industrial SMEs and those in emerging markets, particularly Mexico and India, benefiting from the relocation of global supply chains.

A declining cost of capital will also reopen IPO windows and stimulate merger and acquisition activity. Big Pharma companies, for example, hold substantial cash reserves and are actively targeting undervalued biotech SMEs, creating a potential source of rapid alpha.

Finally, information inefficiencies, exacerbated by the implementation of MiFID regulations in Europe and increased performance dispersion, call for active management to avoid so-called zombie companies and identify winners with robust balance sheets.

The primary downside risk remains a hard landing driven by persistently high interest rates. Weaker SME balance sheets would leave the segment vulnerable to a wave of defaults, reversing sentiment and extending the period of underperformance.

However, current valuation discounts suggest that much of this risk is already priced in. SMID stocks represent innovation, operating leverage and flexibility, qualities that large-cap companies increasingly lack.

The segment’s upside potential hinges on a sustained easing cycle, which would act as a catalyst for cyclical recovery, M&A activity and IPOs. Future alpha, however, is likely to be selective and sector-driven. Priority should be given to SMEs positioned within structural super-cycles such as defence and biotech, as well as geopolitical themes like near-shoring.

European peripheral countries and emerging markets should not be overlooked. Their small-cap segments, often trading at discounted valuations, are among the primary beneficiaries of supply-chain relocation flows and more accommodative monetary policies. In these regions, the agility of SMEs could prove decisive and underpin future outperformance.