The Interest-Rate Myth and What Really Drives US Small-Cap Returns

The Interest-Rate Myth and What Really Drives US Small-Cap Returns

With the current market consensus that the Federal Reserve (Fed) will be more hawkish regarding rates, a familiar narrative has returned: Rising interest rates are bad for small-cap stocks. The logic is straightforward: Smaller companies are perceived as being more leveraged, more dependent on external financing, and therefore more vulnerable to higher borrowing costs. As a result, the argument goes, when the Fed tightens monetary policy, small caps are destined to underperform.

It's an intuitive argument. It’s just one that history does not support.

As we looked across previous Fed tightening cycles, we found little evidence that higher interest rates consistently translated into weaker small-cap performance. In fact, excluding the most recent tightening cycle—which was heavily influenced by the extraordinary concentration of returns among the “Magnificent Seven”—small-caps have, on average, outperformed large-caps during periods of rising rates. Including the most recent, Magnificent-Seven dominated cycle, leadership becomes more balanced, but the broader conclusion remains unchanged: Rising rates alone have not been a reliable predictor of relative returns between small- and large-caps.

The same pattern was evident historically during easing cycles. Lower interest rates have generally been supportive for equities but have not consistently favored either small- or large-cap stocks. Leadership has shifted from one cycle to the next, suggesting that monetary policy itself has rarely determined market leadership.

If the historical relationship between interest rates and small-cap performance is so weak, why does the perception persist? Part of the answer lies in another widely held assumption—that small-cap companies are broadly overleveraged. In reality, the Russell 2000 Index is far more financially diverse than many investors appreciate.

According to Furey Research Partners, approximately one-third of the companies in the index hold more cash than debt, while nearly half of the index’s total debt is concentrated in companies representing just 12% of its market capitalization. Many small-cap businesses also do not rely on debt as a primary source of capital, instead funding growth through internally generated cash flow, disciplined capital allocation, or equity financing. In other words, investors often speak about the Russell 2000 Index as though it represents a single balance sheet. It doesn't. It represents nearly 2,000 companies with dramatically different capital structures, financial profiles, and competitive positions. Taken together, the historical performance data and financial characteristics of today’s small-cap universe challenge one of the market’s most enduring myths.

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