V-Lab
Gvs S P A GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
36.98%
decreased by 1.93%
1 Week
40.29%
increased by 1.38%
1 Month
41.96%
increased by 3.05%
Analysis last updated: Saturday, September 19, 2026 at 10:23 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 19, 2020 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 1 trading day, meaning a shock loses half its impact after approximately 1 day.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 1-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 3.2784 | 2.93*** |
| αARCH | 0.1763 | 1.63 |
| βGARCH | 0.3252 | 1.81* |
| γleverage | 0.0822 | 0.43 |
0.543
Persistence1d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 3.2784 | 2.93*** |
α ARCH Response to squared shocks | 0.1763 | 1.63 |
β GARCH Volatility persistence | 0.3252 | 1.81* |
γ leverage Additional response to negative shocks | 0.0822 | 0.43 |
Persistence:
0.543
Half-life:
1 days
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