V-Lab
Dyaco International Inc Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
31.28%
decreased by 0.85%
1 Week
32.53%
increased by 0.40%
1 Month
34.34%
increased by 2.21%
Analysis last updated: Friday, September 11, 2026 at 09:10 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 24, 2011 to Sep 4, 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 4 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 | 1.3120 | 3.14*** |
| αARCH | 0.1363 | 3.57*** |
| βGARCH | 0.6917 | 9.98*** |
Spline Coefficients
K=9
| γ1 | 0.6031 | 2.17** |
| γ2 | -0.6901 | -1.73* |
| γ3 | 0.0876 | 0.34 |
| γ4 | -0.4420 | -1.97** |
| γ5 | 1.4525 | 5.57*** |
| γ6 | -1.8568 | -6.92*** |
| γ7 | 1.0269 | 4.00*** |
| γ8 | -0.0390 | -0.18 |
| γ9 | -0.2290 | -1.47 |
0.828
Persistence4d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.3120 | 3.14*** |
α ARCH Response to squared shocks | 0.1363 | 3.57*** |
β GARCH Volatility persistence | 0.6917 | 9.98*** |
Spline Coefficients
K=9
| γ1 | 0.6031 | 2.17** |
| γ2 | -0.6901 | -1.73* |
| γ3 | 0.0876 | 0.34 |
| γ4 | -0.4420 | -1.97** |
| γ5 | 1.4525 | 5.57*** |
| γ6 | -1.8568 | -6.92*** |
| γ7 | 1.0269 | 4.00*** |
| γ8 | -0.0390 | -0.18 |
| γ9 | -0.2290 | -1.47 |
Persistence:
0.828
Half-life:
4 days
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