China Yangtze Power Co Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 29th, 2026
1 Day
15.43%
increased by 0.29%
1 Week
15.52%
increased by 0.38%
1 Month
15.85%
increased by 0.71%
Analysis last updated: Thursday, October 29, 2026 at 09:01 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 18, 2003 to Oct 23, 2026Model Insight
With persistence 0.993, volatility shocks have a half-life of 97 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GJR-GARCH Model
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High persistence: persistence 0.993, shock half-life ~97 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0121 | 3.04*** |
| αARCH | 0.0552 | 4.23*** |
| βGARCH | 0.9486 | 148.30*** |
| γleverage | -0.0218 | -1.15 |
0.993
Persistence97d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0121 | 3.04*** |
α ARCH Response to squared shocks | 0.0552 | 4.23*** |
β GARCH Volatility persistence | 0.9486 | 148.30*** |
γ leverage Additional response to negative shocks | -0.0218 | -1.15 |
Persistence:
0.993
Half-life:
97 days
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