V-Lab
VIEL & Cie SA GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
27.66%
increased by 3.39%
1 Week
29.24%
increased by 4.97%
1 Month
32.07%
increased by 7.80%
Analysis last updated: Tuesday, August 25, 2026 at 06:25 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 21, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 22% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.5787 | 27.16*** |
α ARCH Response to squared shocks | 0.1874 | 21.09*** |
β GARCH Volatility persistence | 0.6684 | 88.18*** |
γ leverage Additional response to negative shocks | 0.0408 | 2.51** |
Persistence:
0.876
Half-life:
5 days
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