V-Lab
Sam Holdings Corporation Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
20.43%
decreased by 0.71%
1 Week
22.43%
increased by 1.29%
1 Month
26.02%
increased by 4.88%
Analysis last updated: Wednesday, August 5, 2026 at 08:32 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 21, 2007 to Jul 31, 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 | 1.0382 | 4.77*** |
α ARCH Response to squared shocks | 0.1684 | 8.72*** |
β GARCH Volatility persistence | 0.7180 | 21.07*** |
Spline Coefficients
K=10
| γ1 | -0.4726 | -2.27** |
| γ2 | 0.7713 | 2.53** |
| γ3 | -0.3928 | -2.15** |
| γ4 | -0.0555 | -0.35 |
| γ5 | 0.3570 | 2.22** |
| γ6 | -0.4223 | -1.93* |
| γ7 | 0.7073 | 2.62*** |
| γ8 | -1.0357 | -4.20*** |
| γ9 | 0.7365 | 3.78*** |
| γ10 | -0.1829 | -1.34 |
Persistence:
0.886
Half-life:
6 days
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