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V-Lab
V-Lab

Hong Kong Hang Seng Index GJR-GARCH Volatility Analysis

Volatility prediction for Thursday, September 10th, 2026

1 Day

15.80%

decreased by 0.44%

1 Week

16.17%

decreased by 0.07%

1 Month

17.41%

increased by 1.17%

Analysis last updated: Wednesday, September 9, 2026 at 09:09 AM UTC

Date Range:

from

to

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 Sep 4, 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***
αARCH0.0411
3.31***
βGARCH0.9031
96.94***
γleverage0.0756
3.51***

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

0.0411
3.31***
β

GARCH

Volatility persistence

0.9031
96.94***
γ

leverage

Additional response to negative shocks

0.0756
3.51***

Persistence:

0.982

Half-life:

38 days