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China Yangtze Power Co Ltd GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, October 29th, 2026

1 Day

17.04%

increased by 0.98%

1 Week

17.16%

increased by 1.10%

1 Month

17.61%

increased by 1.55%

Analysis last updated: Thursday, October 29, 2026 at 09:01 PM UTC

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Date Range:

from

10/28/2024

to

10/28/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of China Yangtze Power Co Ltd GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 18, 2003 to Oct 23, 2026

Model Insight

With persistence 0.995, volatility shocks have a half-life of 152 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 = 5.68 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.995, shock half-life ~152 daysv = 5.68 · fat tails
ParamValuet-stat
ωlong-run3.0413
1.24
αscore0.0571
11.76***
βpersistence0.9955
306.58***
νDF5.6759
2.64***

0.995

Persistence

152d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

3.0413
1.24
α

score

Weight on the scaled score

0.0571
11.76***
β

persistence

Volatility persistence

0.9955
306.58***
ν

DF

Student-t tail thickness

5.6759
2.64***

Persistence:

0.995

Half-life:

152 days