U.S. Small-Cap to Large-Cap Ratio Falls to Lowest Level Since November 2025
nashnova research
The Russell 2000-to-S&P 500 ratio has hit a near-one-year low, as structural differences in interest-rate exposure systematically squeeze small-cap funding costs and margins, erasing the early-year outperformance.
How wide is the gap now?
The Russell 2000 (small-cap index tracking the 2,000 smallest US-listed companies) hit a stage high of 3,068.42 on August 14, then pulled back 10.4%.
The S&P 500 kept climbing, setting an all-time high of 7,844.52 in early October — up 13.3% year-to-date.
This means → the narrative has flipped from "small-caps lead" to "large-caps alone," with the ratio back to November 2025 levels.
Why do small caps crack first when rates rise?
S&P 500 companies fund mostly through long-term, fixed-rate corporate bonds, with an average duration of roughly six and a half years — a rate rise barely touches near-term payments.
About 30% of Russell 2000 constituents rely on short-term, floating-rate bank loans. In plain terms = big companies locked in the old rate; small companies reprice every quarter at the new one.
US Treasury yields — 2-year, 10-year, 30-year — have kept climbing, directly raising small-cap borrowing costs and compressing margins.
What else is dragging on small caps?
Concentrated revenue base: large caps draw on diversified global sales; Russell 2000 firms lean heavily on the US domestic market. This means → when US labor and manufacturing gauges soften, small caps take the first hit.
AI speculation cooling: small-cap names that rode the AI hype earlier this year have pulled back sharply.
Macro uncertainty: the upcoming US CPI release has pushed capital to the sidelines, suppressing the seasonal pre-midterm rally small caps typically enjoy.
What to watch next?
The key trigger: when rate expectations clarify. If the market confirms the hiking cycle has peaked, floating-rate pressure eases and small caps have room to regain relative strength.
Until then, high funding costs, domestic-revenue dependence, and fading speculation stack up — small-cap underperformance looks hard to reverse in the near term.
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