V-Lab
Vulcan Infrastructure and Power Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
87.39%
decreased by 1.47%
1 Week
92.89%
increased by 4.03%
1 Month
98.32%
increased by 9.46%
Analysis last updated: Monday, September 14, 2026 at 09:39 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 15, 2021 to Sep 11, 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 2 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 | 0.9131 | 5.41*** |
| αARCH | 0.1254 | 2.73*** |
| βGARCH | 0.6171 | 5.48*** |
Spline Coefficients
K=2
| γ1 | -0.1660 | -1.59 |
| γ2 | 0.2301 | 1.75* |
0.743
Persistence2d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9131 | 5.41*** |
α ARCH Response to squared shocks | 0.1254 | 2.73*** |
β GARCH Volatility persistence | 0.6171 | 5.48*** |
Spline Coefficients
K=2
| γ1 | -0.1660 | -1.59 |
| γ2 | 0.2301 | 1.75* |
Persistence:
0.743
Half-life:
2 days
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