V-Lab
CAC 40 Index GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
12.29%
decreased by 0.24%
1 Week
12.72%
increased by 0.19%
1 Month
14.12%
increased by 1.59%
Analysis last updated: Tuesday, August 25, 2026 at 04:03 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0352 | 16.09*** |
α ARCH Response to squared shocks | 0.0115 | 5.24*** |
β GARCH Volatility persistence | 0.8996 | 441.87*** |
γ leverage Additional response to negative shocks | 0.1336 | 28.16*** |
Persistence:
0.978
Half-life:
31 days
Other GJR-GARCH Analyses on Equity Indices