Financial Stress Index vs VIX
Live side-by-side comparison with current values, changes, and key statistics.
Why This Comparison Matters
VIX is pure equity volatility while STLFSI4 is broader financial stress. When STLFSI4 rises without VIX, stress is concentrated in credit and Treasury markets. When VIX rises without STLFSI4, equity-specific stress is present but financial system resilience is intact. Both rising together signals comprehensive risk-off.
Cross-Asset Analysis
Before getting to the spread, note what each leg actually represents: Financial Stress Index (StL) is st. Louis Fed Financial Stress Index, below zero = below-average stress, and VIX Index is CBOE Volatility Index, the "fear gauge" measuring S&P 500 expected volatility. Policy-driven transitions introduce fast repricing into the Financial Stress Index (StL)-VIX Index relationship because the two markets respond to policy guidance on different timescales.
Analysts merge Financial Stress Index (StL) with VIX Index to build cross-asset indicators that are harder to game than any single-market series. Idiosyncratic shocks in either Financial Stress Index (StL) or VIX Index produce spread moves disconnected from the underlying macro story. Cross-asset flows track macro regime changes with typical lags, which is why spreads like Financial Stress Index (StL)-VIX Index often precede coincident indicators.
Financial Stress Index (StL) belongs to the Credit & Financial Stress space, while VIX Index belongs to Volatility, and the interaction between those two worlds is where the relevant macro information surfaces. Cross-asset pairs like Financial Stress Index (StL) versus VIX Index surface the macro variables that traverse asset classes: liquidity, inflation, real rates, and risk appetite. The Credit & Financial Stress and Volatility segments share structural drivers but differ in sensitivity, and the Financial Stress Index (StL)-VIX Index spread captures those sensitivities.
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Frequently Asked Questions
What is the relationship between Financial Stress Index (StL) and VIX Index?+
Financial Stress Index (StL) and VIX Index are connected through shared macro drivers across asset classes. When the dominant macro driver shifts, both respond, though with different sensitivities and at different speeds. The spread between Financial Stress Index (StL) and VIX Index captures the specific macro signal that flows through this relationship.
When does Financial Stress Index (StL) typically lead VIX Index?+
Financial Stress Index (StL) tends to lead VIX Index during macro regime changes, where the more liquid asset moves first. In those periods, moves in Financial Stress Index (StL) precede corresponding moves in VIX Index by days to weeks, depending on the transmission channel and the depth of each market.
How are Financial Stress Index (StL) and VIX Index historically correlated?+
Long-run correlation between Financial Stress Index (StL) and VIX Index varies by regime. Cross-asset correlations vary by regime, tending to tighten in stress and loosen during normal conditions. The correlation is not stable: it shifts with macro conditions, and the periods when it breaks down are often the most informative moments in the Financial Stress Index (StL)-VIX Index relationship.
What macro conditions drive divergence between Financial Stress Index (StL) and VIX Index?+
Divergence between Financial Stress Index (StL) and VIX Index typically arises from idiosyncratic shocks in one asset, policy interventions, or structural shifts in demand. When one asset's idiosyncratic drivers dominate, the spread moves in ways that the common macro story does not predict, which is usually a signal to look more carefully at the specific drivers at work in Financial Stress Index (StL) or VIX Index.
Is Financial Stress Index (StL) a hedge for VIX Index?+
Cross-asset hedges between Financial Stress Index (StL) and VIX Index work when the macro drivers of the two assets are sufficiently decorrelated, which depends on the regime and therefore needs to be reviewed as conditions change. Effective hedging requires matching the hedge to the specific risk being protected, and the Financial Stress Index (StL)-VIX Index pair is best stress-tested under scenarios the investor most worries about before being sized into a real portfolio.
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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.