Market Regime Detection
Identifies whether markets are in normal, elevated volatility, or crisis mode.
Market regime affects correlations - assets become more correlated during stress. We use VIX levels to detect the current regime and adjust correlation estimates accordingly.
Formula
Regime Multiplier: Normal (VIX<20) = 1.0, Elevated (20-30) = 1.15, Crisis (>30) = 1.3Methodology
One of the most important findings in financial research is that correlations increase during market stress. This phenomenon, called "correlation breakdown," means diversification benefits erode exactly when you need them most.
The research by Longin & Solnik (2001) documented that international equity market correlations: - Average around 0.4-0.6 in normal markets - Rise to 0.7-0.9 during extreme market moves
We use VIX as a regime indicator: - VIX < 20: Normal market (baseline correlations) - VIX 20-30: Elevated volatility (correlations × 1.15) - VIX > 30: Crisis mode (correlations × 1.3)
This adjustment provides more realistic risk estimates during stressed markets, preventing overconfidence in diversification benefits when they matter most.
How to Interpret
| Range | Label | Meaning |
|---|---|---|
| < 20 | Normal | Calm markets - baseline correlations apply |
| 20 to 30 | Elevated | Increased volatility - correlations rising |
| ≥ 30 | Crisis | High stress - correlations significantly elevated |
Data Source
VIX (CBOE Volatility Index) from FRED economic database.
Reference
Longin, F. & Solnik, B. (2001). Extreme Correlation of International Equity Markets. Journal of Finance, 56(2), 649-676
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For Educational Purposes Only
This analysis is not investment advice. Results are based on simplified models using historical data. Past performance does not guarantee future results. All investments carry risk of loss. Consult a qualified financial advisor before making investment decisions.