Inpex Corp GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 22nd, 2026
1 Day
31.45%
decreased by 1.05%
1 Week
31.86%
decreased by 0.64%
1 Month
33.25%
increased by 0.75%
Analysis last updated: Thursday, October 22, 2026 at 07:23 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 17, 2004 to Oct 16, 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 | 0.1477 | 3.61*** |
| αARCH | 0.0600 | 4.08*** |
| βGARCH | 0.8913 | 48.73*** |
| γleverage | 0.0495 | 1.64 |
0.976
Persistence29d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1477 | 3.61*** |
α ARCH Response to squared shocks | 0.0600 | 4.08*** |
β GARCH Volatility persistence | 0.8913 | 48.73*** |
γ leverage Additional response to negative shocks | 0.0495 | 1.64 |
Persistence:
0.976
Half-life:
29 days
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