Cellnex Telecom SAU GJR-GARCH Volatility Analysis
Volatility prediction for Monday, October 26th, 2026
1 Day
24.40%
decreased by 0.74%
1 Week
24.77%
decreased by 0.37%
1 Month
25.82%
increased by 0.68%
Analysis last updated: Sunday, October 25, 2026 at 07:56 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 13 trading days, meaning a shock loses half its impact after approximately 13 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 13-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1640 | 3.96*** |
| αARCH | 0.0424 | 2.33** |
| βGARCH | 0.8608 | 35.63*** |
| γleverage | 0.0875 | 1.91* |
0.947
Persistence13d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1640 | 3.96*** |
α ARCH Response to squared shocks | 0.0424 | 2.33** |
β GARCH Volatility persistence | 0.8608 | 35.63*** |
γ leverage Additional response to negative shocks | 0.0875 | 1.91* |
Persistence:
0.947
Half-life:
13 days
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