V-Lab
Ppb Group Bhd GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
23.59%
decreased by 0.82%
1 Week
23.84%
decreased by 0.57%
1 Month
24.71%
increased by 0.30%
Analysis last updated: Friday, September 11, 2026 at 08:57 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 36 trading days, meaning a shock loses half its impact after approximately 36 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 36-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0661 | 2.59*** |
| αARCH | 0.0732 | 3.11*** |
| βGARCH | 0.8948 | 57.73*** |
| γleverage | 0.0259 | 0.69 |
0.981
Persistence36d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0661 | 2.59*** |
α ARCH Response to squared shocks | 0.0732 | 3.11*** |
β GARCH Volatility persistence | 0.8948 | 57.73*** |
γ leverage Additional response to negative shocks | 0.0259 | 0.69 |
Persistence:
0.981
Half-life:
36 days
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