V-Lab
Yestar Healthcare Holdings Co Ltd GJR-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Tuesday, August 25th, 2026
1 Day
96.77%
1 Week
97.05%
1 Month
98.19%
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
Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.
Leverage: Negative returns increase volatility 90% more than positive returns
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1103 | 9.89*** |
α ARCH Response to squared shocks | 0.0785 | 7.12*** |
β GARCH Volatility persistence | 0.8864 | 113.11*** |
γ leverage Additional response to negative shocks | 0.0703 | 3.14*** |
Persistence:
1.000
Half-life:
-
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