V-Lab
China Yangtze Power Co Ltd MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
16.15%
decreased by 0.30%
1 Week
16.22%
decreased by 0.23%
1 Month
16.66%
increased by 0.21%
Analysis last updated: Wednesday, September 16, 2026 at 03:51 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 18, 2003 to Sep 14, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
σ
MF2-GARCH Model
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Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 26 | |
| αARCH | 0.0659 | 5.06*** |
| βGARCH | 0.8525 | 27.01*** |
| γleverage | -0.0086 | -0.50 |
| λ₁tau intercept | 0.0125 | 2.17** |
| λ₂forecast adj. | 0.0454 | 3.27*** |
| λ₃tau persistence | 0.9479 | 60.81*** |
0.914
Persistence8d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 26 | |
α ARCH Response to squared shocks | 0.0659 | 5.06*** |
β GARCH Volatility persistence | 0.8525 | 27.01*** |
γ leverage Additional response to negative shocks | -0.0086 | -0.50 |
λ₁ tau intercept Baseline long-term coefficient | 0.0125 | 2.17** |
λ₂ forecast adj. Forecast performance sensitivity | 0.0454 | 3.27*** |
λ₃ tau persistence Long-term factor persistence | 0.9479 | 60.81*** |
Persistence:
0.914
Half-life:
8 days
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