V-Lab
Merck KGaA Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
24.86%
increased by 0.79%
1 Week
26.74%
increased by 2.67%
1 Month
29.27%
increased by 5.20%
Analysis last updated: Saturday, September 19, 2026 at 08:50 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 20, 1995 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 4 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 | 0.5903 | 7.97*** |
| αARCH | 0.1291 | 7.72*** |
| βGARCH | 0.6914 | 17.18*** |
Spline Coefficients
K=5
| γ1 | -0.0591 | -5.51*** |
| γ2 | 0.0706 | 4.70*** |
| γ3 | -0.0170 | -1.71* |
| γ4 | 0.0203 | 2.11** |
| γ5 | -0.0232 | -3.39*** |
0.821
Persistence4d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.5903 | 7.97*** |
α ARCH Response to squared shocks | 0.1291 | 7.72*** |
β GARCH Volatility persistence | 0.6914 | 17.18*** |
Spline Coefficients
K=5
| γ1 | -0.0591 | -5.51*** |
| γ2 | 0.0706 | 4.70*** |
| γ3 | -0.0170 | -1.71* |
| γ4 | 0.0203 | 2.11** |
| γ5 | -0.0232 | -3.39*** |
Persistence:
0.821
Half-life:
4 days
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