Russell 2000 (IWM) vs VIX
IWM trades at $270.95 against VIX at 18.64 on April 29, 2026. Small-caps are the most credit-sensitive major equity exposure: approximately 38 percent of Russell 2000 companies have variable-rate debt and approximately 14 percent have negative trailing 12-month earnings, both materially higher than SPY-equivalent measures.
Also known as: Russell 2000 ETF (IWM) (ETF_IWM, Russell 2000, RUT) · VIX (fear index, volatility index, CBOE VIX)
Why This Comparison Matters
IWM trades at $270.95 against VIX at 18.64 on April 29, 2026. Small-caps are the most credit-sensitive major equity exposure: approximately 38 percent of Russell 2000 companies have variable-rate debt and approximately 14 percent have negative trailing 12-month earnings, both materially higher than SPY-equivalent measures. The credit sensitivity creates a VIX-beta of approximately negative 1.2 versus SPY at negative 1.0, distinct from EEM's negative 1.4 (which has currency amplification) but driven by a different mechanism. The pair captures small-cap credit-cycle dynamics in real time and serves as one of the cleanest leading indicators for credit-led market stress.
The April 2026 Snapshot: IWM $270.95, VIX 18.64
IWM closed at $270.95 on April 29, 2026 after trading $273.91 the previous session. VIX closed at 18.64. IWM is approximately +6 percent year-to-date in 2026 versus SPY at -2 percent, an unusual relative outperformance that reflects two factors. First, the Iran-war oil shock has not transmitted into small-cap credit stress because IWM has higher energy-sector weight (approximately 6.5 percent versus SPY 3.5 percent) and oil-price gains have lifted the small-cap energy sub-index. Second, expected Fed cuts of 50 to 75 basis points through 2026 disproportionately help small-caps because of their higher floating-rate debt exposure.
Over a 24-month window IWM has returned approximately +25 percent versus SPY at +28 percent, with IWM trailing slightly through the period. Over a 36-month window the gap is wider: IWM +30 percent versus SPY +60 percent. Small-caps have underperformed substantially since the post-COVID reopening rally peaked in November 2021. The current 2026 outperformance reflects either the start of a sustained mean-reversion or temporary factor flows that will reverse.
Why Small-Caps Have ~1.2x VIX-Beta vs SPY
IWM has VIX-beta of approximately negative 1.2 versus SPY at negative 1.0. The 20 percent excess sensitivity has a single dominant driver: small-caps are highly credit-sensitive because of their balance-sheet structure.
Approximately 38 percent of Russell 2000 companies carry variable-rate debt versus approximately 18 percent for SPY constituents. When VIX rises, credit spreads widen across the system, and the spread widening produces immediate cash-flow and refinancing pressure for small-caps that does not affect large-caps as severely. Approximately 14 percent of Russell 2000 companies have negative trailing 12-month earnings (sometimes called "zombie" companies), versus approximately 3 percent for SPY constituents. These zombie companies are dependent on cheap financing and become vulnerable when financial conditions tighten. The combined effect: small-caps decline more than SPY during VIX spikes, recover more strongly during VIX compressions, and exhibit the negative 1.2 VIX-beta consistently across multiple historical stress episodes.
The Russell 2000 Reconstitution: Late June Liquidity Event
The Russell 2000 reconstitutes annually in late June. The 2024 reconstitution generated approximately $30 to $40 billion of mechanical trading flow as index funds rebalanced. Beginning in 2026, FTSE Russell shifted to semi-annual reconstitution (June and November) to reduce single-event impact and spread flow throughout the year.
Conditional Forward Response (Tail Events)
How VIX has historically behaved in the 5 sessions following a top-decile or bottom-decile daily move in Russell 2000 ETF (IWM). Computed from 1,249 aligned daily observations ending .
Following these triggers, VIX falls 0.53% on average over the next 5 sessions, versus an unconditional baseline of +1.14%. 125 qualifying events; VIX closed positive in 42% of them.
90-Day Statistics
Explore Each Metric
Related Scenarios & Forecasts
Get daily macro analysis comparing key metrics delivered to your inbox. Stay ahead of market-moving divergences.
Frequently Asked Questions
What are the April 30, 2026 levels for IWM and VIX?+
IWM closed at $270.95 on April 29, 2026 (previous session $273.91). VIX closed at 18.64. IWM is approximately +6 percent year-to-date 2026 versus SPY at -2 percent, an unusual outperformance reflecting expected Fed cuts disproportionately benefiting small-caps via floating-rate debt and the Iran-war oil shock lifting IWM's higher energy-sector weight.
Why does IWM have higher VIX-beta than SPY?+
IWM has VIX-beta of approximately negative 1.2 versus SPY at negative 1.0. The 20 percent excess sensitivity is driven by small-cap balance-sheet structure: approximately 38 percent of Russell 2000 companies carry variable-rate debt versus 18 percent for SPY constituents, and approximately 14 percent of Russell 2000 companies have negative trailing 12-month earnings ("zombies") versus 3 percent for SPY. When VIX rises, credit spreads widen and these credit-sensitive small-caps face immediate refinancing and cash-flow pressure that does not hit large-caps as severely.
How big is small-cap credit sensitivity in dollar terms?+
A 100 basis point rise in average small-cap borrowing costs translates to approximately $40 billion in additional annual interest expense across the Russell 2000 (rough estimate based on $4 trillion total debt and 38 percent variable-rate share). For context, the total Russell 2000 net income for 2025 was approximately $80 billion, so a 100bp cost increase consumes 50 percent of net income. This is why small-caps are far more rate-sensitive than SPY constituents, where the 18 percent variable-rate share and $7 trillion total debt produce only $12 billion incremental interest expense per 100bp rise (vs SPY net income of $1.6 trillion).
Related Comparisons
Explore Across Convex
Data sourced from FRED, CoinGecko, CBOE, and other providers. This page is for informational purposes only and does not constitute financial advice. Past performance does not guarantee future results.