V-Lab
Yw Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
24.24%
increased by 0.29%
1 Week
24.37%
increased by 0.42%
1 Month
24.80%
increased by 0.85%
Analysis last updated: Friday, September 11, 2026 at 08:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 11, 2003 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 19 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 | 1.6985 | 7.65*** |
| αARCH | 0.1198 | 6.64*** |
| βGARCH | 0.8442 | 36.17*** |
Spline Coefficients
K=2
| γ1 | -0.0040 | -1.21 |
| γ2 | 0.0097 | 2.28** |
0.964
Persistence19d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.6985 | 7.65*** |
α ARCH Response to squared shocks | 0.1198 | 6.64*** |
β GARCH Volatility persistence | 0.8442 | 36.17*** |
Spline Coefficients
K=2
| γ1 | -0.0040 | -1.21 |
| γ2 | 0.0097 | 2.28** |
Persistence:
0.964
Half-life:
19 days
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