V-Lab
China Yangtze Power Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
18.22%
decreased by 0.31%
1 Week
18.23%
decreased by 0.30%
1 Month
18.29%
decreased by 0.24%
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 0.990, volatility shocks have a half-life of 71 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2731 | 6.49*** |
α ARCH Response to squared shocks | 0.0512 | 7.35*** |
β GARCH Volatility persistence | 0.9391 | 116.21*** |
Spline Coefficients
K=1
| γ1 | 0.0018 | 2.31** |
Persistence:
0.990
Half-life:
71 days
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