V-Lab
E.ON SE Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
21.31%
increased by 2.38%
1 Week
21.49%
increased by 2.56%
1 Month
22.00%
increased by 3.07%
Analysis last updated: Saturday, September 19, 2026 at 08:39 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 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 15 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.4098 | 4.52*** |
| αARCH | 0.0894 | 8.92*** |
| βGARCH | 0.8648 | 56.06*** |
Spline Coefficients
K=6
| γ1 | 0.0864 | 5.47*** |
| γ2 | -0.1368 | -6.09*** |
| γ3 | 0.0826 | 5.38*** |
| γ4 | -0.0515 | -3.67*** |
| γ5 | 0.0242 | 1.84* |
| γ6 | -0.0034 | -0.35 |
0.954
Persistence15d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.4098 | 4.52*** |
α ARCH Response to squared shocks | 0.0894 | 8.92*** |
β GARCH Volatility persistence | 0.8648 | 56.06*** |
Spline Coefficients
K=6
| γ1 | 0.0864 | 5.47*** |
| γ2 | -0.1368 | -6.09*** |
| γ3 | 0.0826 | 5.38*** |
| γ4 | -0.0515 | -3.67*** |
| γ5 | 0.0242 | 1.84* |
| γ6 | -0.0034 | -0.35 |
Persistence:
0.954
Half-life:
15 days
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