V-Lab
Huron Consulting Group Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
41.23%
decreased by 1.68%
1 Week
43.73%
increased by 0.82%
1 Month
45.79%
increased by 2.88%
Analysis last updated: Friday, September 11, 2026 at 10:55 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 13, 2004 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 | 1.5882 | 9.85*** |
| αARCH | 0.1338 | 4.10*** |
| βGARCH | 0.5591 | 7.32*** |
Spline Coefficients
K=9
| γ1 | 0.4301 | 4.96*** |
| γ2 | -0.6500 | -4.46*** |
| γ3 | 0.2186 | 1.82* |
| γ4 | 0.1358 | 0.97 |
| γ5 | -0.2525 | -1.42 |
| γ6 | 0.2170 | 1.19 |
| γ7 | -0.1908 | -1.18 |
| γ8 | 0.1881 | 1.18 |
| γ9 | -0.1493 | -1.21 |
0.693
Persistence2d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.5882 | 9.85*** |
α ARCH Response to squared shocks | 0.1338 | 4.10*** |
β GARCH Volatility persistence | 0.5591 | 7.32*** |
Spline Coefficients
K=9
| γ1 | 0.4301 | 4.96*** |
| γ2 | -0.6500 | -4.46*** |
| γ3 | 0.2186 | 1.82* |
| γ4 | 0.1358 | 0.97 |
| γ5 | -0.2525 | -1.42 |
| γ6 | 0.2170 | 1.19 |
| γ7 | -0.1908 | -1.18 |
| γ8 | 0.1881 | 1.18 |
| γ9 | -0.1493 | -1.21 |
Persistence:
0.693
Half-life:
2 days
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