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V-Lab

China Yangtze Power Co Ltd GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

18.75%

decreased by 0.24%

1 Week

18.78%

decreased by 0.21%

1 Month

18.90%

decreased by 0.09%

Analysis last updated: Tuesday, August 25, 2026 at 06:05 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of China Yangtze Power Co Ltd GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 18, 2003 to Aug 21, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 99 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 67% more than negative returns

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0121
12.09***
α

ARCH

Response to squared shocks

0.0548
16.72***
β

GARCH

Volatility persistence

0.9492
596.97***
γ

leverage

Additional response to negative shocks

-0.0219
-4.61***

Persistence:

0.993

Half-life:

99 days