V-Lab
Cellnex Telecom SAU Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
34.06%
increased by 6.54%
1 Week
32.39%
increased by 4.87%
1 Month
29.00%
increased by 1.48%
Analysis last updated: Friday, July 24, 2026 at 08:08 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 7, 2015 to Jul 17, 2026Model Insight
This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 5 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0377 | 7.82*** |
α ARCH Response to squared shocks | 0.1121 | 4.93*** |
β GARCH Volatility persistence | 0.7594 | 16.69*** |
Spline Coefficients
K=3
| γ1 | 0.0803 | 2.76*** |
| γ2 | -0.1307 | -3.11*** |
| γ3 | 0.0668 | 3.06*** |
Persistence:
0.872
Half-life:
5 days
Other Cellnex Telecom SAU Analyses
Other Zero Slope Spline-GARCH Analyses on International Equities