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V-Lab

Hong Kong Hang Seng Index GJR-GARCH Volatility Analysis

Volatility prediction for Monday, October 5th, 2026

1 Day

20.50%

increased by 5.43%

1 Week

20.64%

increased by 5.57%

1 Month

21.12%

increased by 6.05%

Analysis last updated: Friday, October 2, 2026 at 09:08 AM UTC

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Date Range:

from

10/02/2024

to

10/02/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Hong Kong Hang Seng Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Oct 2, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 184% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 184% more than positive returns
ParamValuet-stat
ωconst0.0416
4.98***
αARCH0.0410
3.31***
βGARCH0.9032
96.99***
γleverage0.0755
3.52***

0.982

Persistence

38d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0416
4.98***
α

ARCH

Response to squared shocks

0.0410
3.31***
β

GARCH

Volatility persistence

0.9032
96.99***
γ

leverage

Additional response to negative shocks

0.0755
3.52***

Persistence:

0.982

Half-life:

38 days