V-Lab
Shimizu Corp Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
32.53%
decreased by 0.58%
1 Week
32.91%
decreased by 0.20%
1 Month
33.76%
increased by 0.65%
Analysis last updated: Tuesday, August 25, 2026 at 07:22 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 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 7 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2657 | 8.88*** |
α ARCH Response to squared shocks | 0.1300 | 8.08*** |
β GARCH Volatility persistence | 0.7775 | 33.10*** |
Spline Coefficients
K=6
| γ1 | 0.0502 | 4.65*** |
| γ2 | -0.0848 | -5.05*** |
| γ3 | 0.0512 | 4.42*** |
| γ4 | -0.0280 | -2.80*** |
| γ5 | 0.0268 | 2.46** |
| γ6 | -0.0220 | -2.42** |
Persistence:
0.908
Half-life:
7 days
Other Shimizu Corp Analyses
Other Zero Slope Spline-GARCH Analyses on International Equities