V-Lab
Yestar Healthcare Holdings Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
97.66%
increased by 14.21%
1 Week
101.67%
increased by 18.22%
1 Month
107.12%
increased by 23.67%
Analysis last updated: Tuesday, August 25, 2026 at 06:39 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 14, 2013 to Aug 7, 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 3 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.8348 | 2.24** |
α ARCH Response to squared shocks | 0.3214 | 5.94*** |
β GARCH Volatility persistence | 0.4934 | 8.91*** |
Spline Coefficients
K=10
| γ1 | 2.0288 | 2.07** |
| γ2 | -4.0077 | -2.87*** |
| γ3 | 3.2275 | 3.11*** |
| γ4 | -1.4373 | -1.25 |
| γ5 | 0.4528 | 0.43 |
| γ6 | -1.4421 | -1.93* |
| γ7 | 3.7687 | 5.83*** |
| γ8 | -4.6763 | -6.88*** |
| γ9 | 2.3709 | 3.40*** |
| γ10 | -0.2031 | -0.38 |
Persistence:
0.815
Half-life:
3 days
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