V-Lab
PMA Graphene Technology Group Inc GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
114.25%
increased by 1.00%
1 Week
118.16%
increased by 4.91%
1 Month
128.30%
increased by 15.05%
Analysis last updated: Monday, September 14, 2026 at 09:33 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 22, 2024 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 11-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 0.69 |
| αARCH | 0.0294 | 0.64 |
| βGARCH | 0.8737 | 11.67*** |
| γleverage | 0.0748 | 0.56 |
0.940
Persistence11d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 0.69 |
α ARCH Response to squared shocks | 0.0294 | 0.64 |
β GARCH Volatility persistence | 0.8737 | 11.67*** |
γ leverage Additional response to negative shocks | 0.0748 | 0.56 |
Persistence:
0.940
Half-life:
11 days
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