V-Lab
Ventia Services Group Pty Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
32.99%
decreased by 0.60%
1 Week
33.01%
decreased by 0.58%
1 Month
33.07%
decreased by 0.52%
Analysis last updated: Friday, September 11, 2026 at 09:06 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 23, 2021 to Sep 9, 2026Model Insight
Volatility shocks decay with a half-life of 35 trading days, meaning a shock loses half its impact after approximately 35 days. Returns follow a Student-t distribution with v = 3.28 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 35-day half-lifev = 3.28 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 4.4441 | 0.57 |
| αARCH | 0.0196 | 0.80 |
| βGARCH | 0.9803 | 44.64*** |
| νDF | 3.2810 | 0.54 |
0.980
Persistence35d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 4.4441 | 0.57 |
α ARCH Response to squared shocks | 0.0196 | 0.80 |
β GARCH Volatility persistence | 0.9803 | 44.64*** |
ν DF Student-t tail thickness | 3.2810 | 0.54 |
Persistence:
0.980
Half-life:
35 days
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