V-Lab
China Yangtze Power Co Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
20.29%
decreased by 0.42%
1 Week
20.37%
decreased by 0.34%
1 Month
20.67%
decreased by 0.04%
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 0.995, volatility shocks have a half-life of 146 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 4.86 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.9657 | 4.80*** |
α ARCH Response to squared shocks | 0.0547 | 50.37*** |
β GARCH Volatility persistence | 0.9953 | 1,132.26*** |
ν DF Student-t tail thickness | 4.8597 | 14.41*** |
Persistence:
0.995
Half-life:
146 days
Other China Yangtze Power Co Ltd Analyses
Other GAS-GARCH Student T Analyses on International Equities