V-Lab
CH Biotech R&D Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
29.40%
decreased by 0.26%
1 Week
34.44%
increased by 4.78%
1 Month
38.70%
increased by 9.04%
Analysis last updated: Friday, September 11, 2026 at 09:23 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 2, 2015 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 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 | 2.2646 | 3.91*** |
| αARCH | 0.2564 | 4.22*** |
| βGARCH | 0.4668 | 5.47*** |
Spline Coefficients
K=10
| γ1 | 2.5775 | 3.25*** |
| γ2 | -4.4574 | -3.76*** |
| γ3 | 3.4008 | 4.35*** |
| γ4 | -1.7122 | -2.70*** |
| γ5 | -0.2107 | -0.32 |
| γ6 | 0.1719 | 0.21 |
| γ7 | 0.7652 | 0.75 |
| γ8 | -1.1641 | -0.86 |
| γ9 | 1.3376 | 1.13 |
| γ10 | -0.9995 | -1.78* |
0.723
Persistence2d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.2646 | 3.91*** |
α ARCH Response to squared shocks | 0.2564 | 4.22*** |
β GARCH Volatility persistence | 0.4668 | 5.47*** |
Spline Coefficients
K=10
| γ1 | 2.5775 | 3.25*** |
| γ2 | -4.4574 | -3.76*** |
| γ3 | 3.4008 | 4.35*** |
| γ4 | -1.7122 | -2.70*** |
| γ5 | -0.2107 | -0.32 |
| γ6 | 0.1719 | 0.21 |
| γ7 | 0.7652 | 0.75 |
| γ8 | -1.1641 | -0.86 |
| γ9 | 1.3376 | 1.13 |
| γ10 | -0.9995 | -1.78* |
Persistence:
0.723
Half-life:
2 days
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