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V-Lab

APT Satellite Holdings Ltd GJR-GARCH Volatility Analysis

High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful

Volatility prediction for Friday, September 11th, 2026

1 Day

49.33%

increased by 0.79%

1 Week

49.89%

increased by 1.35%

1 Month

52.07%

increased by 3.53%

Analysis last updated: Friday, September 11, 2026 at 07:17 PM UTC

Date Range:

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to

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graph of APT Satellite Holdings Ltd GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 18, 1996 to Sep 4, 2026

Model Insight

With persistence 1.000, volatility shocks have a half-life of 1386294 trading days (~5501.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 1.000, shock half-life ~1386294 days
ParamValuet-stat
ωconst0.1101
3.65***
αARCH0.1016
4.74***
βGARCH0.9079
77.06***
γleverage-0.0189
-0.58

1.000

Persistence

1386294d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1101
3.65***
α

ARCH

Response to squared shocks

0.1016
4.74***
β

GARCH

Volatility persistence

0.9079
77.06***
γ

leverage

Additional response to negative shocks

-0.0189
-0.58

Persistence:

1.000

Half-life:

1386294 days