V-Lab
China Yangtze Power Co Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
18.75%
decreased by 0.24%
1 Week
18.78%
decreased by 0.21%
1 Month
18.90%
decreased by 0.09%
Analysis last updated: Tuesday, August 25, 2026 at 06:05 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 18, 2003 to Aug 21, 2026Model Insight
With persistence 0.993, volatility shocks have a half-life of 99 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Inverse leverage: Positive returns increase volatility 67% more than negative returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0121 | 12.09*** |
α ARCH Response to squared shocks | 0.0548 | 16.72*** |
β GARCH Volatility persistence | 0.9492 | 596.97*** |
γ leverage Additional response to negative shocks | -0.0219 | -4.61*** |
Persistence:
0.993
Half-life:
99 days
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