Scenario × Asset Analysis

What Happens to Financial Stress Index (StL) When Small Caps Outperform Large Caps?

Small-cap outperformance signals risk-on rotation, Fed pivot, or earnings recovery. What happens when IWM leads SPY?

Financial Stress Index (StL)

-0.24

as of Apr 3, 2026

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Trigger: Russell 2000 ETF (IWM)

$268.71

Condition: IWM/SPY ratio rises 10%+ over 3 months

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How Financial Stress Index (StL) Responds

When Small Caps Outperform Large Caps, Financial Stress Index (StL) typically responds to the changing macro environment. St. Louis Fed Financial Stress Index, below zero = below-average stress. This scenario is particularly relevant for credit & financial stress because changes in Russell 2000 ETF (IWM) directly influence the macro environment for Financial Stress Index (StL). Investors should monitor both the trigger condition and Financial Stress Index (StL)'s response to position accordingly.

Scenario Background

Small-cap outperformance versus large caps (IWM/SPY ratio rising) signals several potential regimes: Fed easing expectations, economic recovery, earnings-cycle acceleration, or rotation out of concentrated mega-cap leadership. Small caps are more cyclical, more domestic-focused, and more interest-rate sensitive than large caps.

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Historical Context

Small caps (Russell 2000) have had several major outperformance cycles: 2003-2006 (recovery cycle, +75% outperformance), 2009-2011 (post-GFC recovery, +40%), 2016-2017 (Trump rally, +15%), and brief episodes in 2020 (+20% in 6 months post-COVID trough). Major underperformance cycles include 1998-2000 (tech bubble large-cap dominance), 2014-2024 (FAANG era), and 2022-2024 (high rates, strong dollar). Historical pattern: small-cap outperformance typically lasts 2-4 years once initiated, with total...