Cellnex Telecom SAU GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, October 26th, 2026
1 Day
26.35%
decreased by 0.93%
1 Week
26.46%
decreased by 0.82%
1 Month
26.77%
decreased by 0.51%
Analysis last updated: Sunday, October 25, 2026 at 07:57 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 7, 2015 to Oct 23, 2026Model Insight
Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days. Returns follow a Student-t distribution with v = 6.87 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 11-day half-lifev = 6.87 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωlong-run | 3.0144 | 2.86*** |
| αscore | 0.0881 | 3.51*** |
| βpersistence | 0.9399 | 37.30*** |
| νDF | 6.8662 | 0.69 |
0.940
Persistence11d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω long-run Long-run variance given a price move | 3.0144 | 2.86*** |
α score Weight on the scaled score | 0.0881 | 3.51*** |
β persistence Volatility persistence | 0.9399 | 37.30*** |
ν DF Student-t tail thickness | 6.8662 | 0.69 |
Persistence:
0.940
Half-life:
11 days
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