V-Lab
Vinacomin Vang Danh Coal GJR-GARCH Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
27.07%
decreased by 0.25%
1 Week
27.71%
increased by 0.39%
1 Month
29.98%
increased by 2.66%
Analysis last updated: Friday, July 24, 2026 at 08:31 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 10, 2011 to Jul 17, 2026Model Insight
This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 79% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1011 | 13.53*** |
α ARCH Response to squared shocks | 0.0788 | 13.62*** |
β GARCH Volatility persistence | 0.9280 | 345.63*** |
γ leverage Additional response to negative shocks | -0.0348 | -4.29*** |
Persistence:
0.989
Half-life:
65 days
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