V-Lab
Cellnex Telecom SAU GJR-GARCH Volatility Analysis
Volatility prediction for Monday, October 5th, 2026
1 Day
31.51%
decreased by 0.95%
1 Week
31.15%
decreased by 1.31%
1 Month
30.09%
decreased by 2.37%
Analysis last updated: Saturday, October 3, 2026 at 11:01 PM 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 2, 2026Model Insight
Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 12-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1719 | 4.04*** |
| αARCH | 0.0463 | 2.38** |
| βGARCH | 0.8550 | 33.94*** |
| γleverage | 0.0856 | 1.82* |
0.944
Persistence12d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1719 | 4.04*** |
α ARCH Response to squared shocks | 0.0463 | 2.38** |
β GARCH Volatility persistence | 0.8550 | 33.94*** |
γ leverage Additional response to negative shocks | 0.0856 | 1.82* |
Persistence:
0.944
Half-life:
12 days
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