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V-Lab

China Yangtze Power Co Ltd EGARCH Volatility Analysis

Volatility prediction for Monday, August 17th, 2026

1 Day

21.43%

decreased by 0.55%

1 Week

21.54%

decreased by 0.44%

1 Month

21.96%

decreased by 0.02%

Analysis last updated: Saturday, August 15, 2026 at 06:17 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of China Yangtze Power Co Ltd EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 18, 2003 to Aug 14, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 95 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Inverse leverage: Positive returns increase volatility 48% more than negative returns

σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0094
9.81***
α

ARCH

Response to squared shocks

0.1093
32.10***
β

GARCH

Volatility persistence

0.9927
1,862.46***
γ

leverage

Additional response to negative shocks

0.0211
6.01***

Persistence:

0.993

Half-life:

95 days