V-Lab
Inpex Corp GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
34.53%
decreased by 1.40%
1 Week
34.77%
decreased by 1.16%
1 Month
35.61%
decreased by 0.32%
Analysis last updated: Saturday, September 19, 2026 at 11:59 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 17, 2004 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 29 trading days, meaning a shock loses half its impact after approximately 29 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 29-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1484 | 3.62*** |
| αARCH | 0.0601 | 4.08*** |
| βGARCH | 0.8909 | 48.65*** |
| γleverage | 0.0500 | 1.65* |
0.976
Persistence29d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1484 | 3.62*** |
α ARCH Response to squared shocks | 0.0601 | 4.08*** |
β GARCH Volatility persistence | 0.8909 | 48.65*** |
γ leverage Additional response to negative shocks | 0.0500 | 1.65* |
Persistence:
0.976
Half-life:
29 days
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