V-Lab
Wawel Sa GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
18.32%
decreased by 0.12%
1 Week
21.56%
increased by 3.12%
1 Month
28.03%
increased by 9.59%
Analysis last updated: Sunday, August 23, 2026 at 01:51 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 30, 1998 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 9 trading days, meaning a shock loses half its impact after approximately 9 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3795 | 24.96*** |
α ARCH Response to squared shocks | 0.2045 | 22.60*** |
β GARCH Volatility persistence | 0.7055 | 99.24*** |
γ leverage Additional response to negative shocks | 0.0260 | 1.79* |
Persistence:
0.923
Half-life:
9 days
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