V-Lab
Ardagh Metal Packaging S A GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, September 22nd, 2026
1 Day
54.10%
increased by 5.58%
1 Week
59.58%
increased by 11.06%
1 Month
66.49%
increased by 17.97%
Analysis last updated: Tuesday, September 22, 2026 at 07:13 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 11, 2021 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days. Returns follow a Student-t distribution with v = 3.16 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 3-day half-lifev = 3.16 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 19.5097 | 1.46 |
| αARCH | 0.1466 | 1.87* |
| βGARCH | 0.8111 | 6.53*** |
| νDF | 3.1552 | 1.33 |
0.811
Persistence3d
Half-life𝑓
GAS-GARCH-T Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 19.5097 | 1.46 |
α ARCH Response to squared shocks | 0.1466 | 1.87* |
β GARCH Volatility persistence | 0.8111 | 6.53*** |
ν DF Student-t tail thickness | 3.1552 | 1.33 |
Persistence:
0.811
Half-life:
3 days
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