V-Lab
China Yangtze Power Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
22.41%
increased by 1.51%
1 Week
22.35%
increased by 1.45%
1 Month
22.14%
increased by 1.24%
Analysis last updated: Wednesday, August 5, 2026 at 06:12 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 18, 2003 to Jul 31, 2026Model Insight
With persistence 0.990, volatility shocks have a half-life of 72 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 | 1.2742 | 6.45*** |
α ARCH Response to squared shocks | 0.0514 | 7.35*** |
β GARCH Volatility persistence | 0.9391 | 116.22*** |
Spline Coefficients
K=1
| γ1 | 0.0018 | 2.27** |
Persistence:
0.990
Half-life:
72 days
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