V-Lab
Inpex Corp GAS-GARCH Student T Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
35.99%
decreased by 1.78%
1 Week
36.07%
decreased by 1.70%
1 Month
36.34%
decreased by 1.43%
Analysis last updated: Sunday, September 20, 2026 at 12:00 AM 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 48 trading days, meaning a shock loses half its impact after approximately 48 days. Returns follow a Student-t distribution with v = 6.69 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
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Shock decay: Shocks decay with a 48-day half-lifev = 6.69 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.9076 | 1.56 |
| αARCH | 0.0672 | 6.44*** |
| βGARCH | 0.9858 | 98.07*** |
| νDF | 6.6852 | 1.27 |
0.986
Persistence48d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.9076 | 1.56 |
α ARCH Response to squared shocks | 0.0672 | 6.44*** |
β GARCH Volatility persistence | 0.9858 | 98.07*** |
ν DF Student-t tail thickness | 6.6852 | 1.27 |
Persistence:
0.986
Half-life:
48 days
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