V-Lab
adidas AG Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
35.79%
decreased by 0.45%
1 Week
35.94%
decreased by 0.30%
1 Month
36.24%
increased by 0.00%
Analysis last updated: Wednesday, August 26, 2026 at 08:09 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 17, 1995 to Aug 21, 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 6 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9311 | 10.51*** |
α ARCH Response to squared shocks | 0.0606 | 5.07*** |
β GARCH Volatility persistence | 0.8348 | 23.43*** |
Spline Coefficients
K=8
| γ1 | -0.0380 | -1.41 |
| γ2 | -0.0011 | -0.03 |
| γ3 | 0.1217 | 3.57*** |
| γ4 | -0.1466 | -3.76*** |
| γ5 | 0.0971 | 2.17** |
| γ6 | -0.0347 | -0.92 |
| γ7 | 0.0001 | 0.00 |
| γ8 | -0.0042 | -0.18 |
Persistence:
0.895
Half-life:
6 days
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