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HSI Volatility Index GJR-GARCH Volatility Analysis

Volatility prediction for Friday, September 25th, 2026

1 Day

64.11%

decreased by 0.78%

1 Week

67.05%

increased by 2.16%

1 Month

73.69%

increased by 8.80%

Analysis last updated: Friday, September 25, 2026 at 09:00 PM UTC

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Date Range:

from

09/24/2024

to

09/24/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of HSI Volatility Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 16, 2010 to Sep 24, 2026

Model Insight

This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.

σ

GJR-GARCH Model

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Inverse leverage: volatility responds almost entirely to positive returns
ParamValuet-stat
ωconst2.1637
3.02***
αARCH0.1410
4.26***
βGARCH0.8463
33.67***
γleverage-0.1380
-3.50***

0.918

Persistence

8d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.1637
3.02***
α

ARCH

Response to squared shocks

0.1410
4.26***
β

GARCH

Volatility persistence

0.8463
33.67***
γ

leverage

Additional response to negative shocks

-0.1380
-3.50***

Persistence:

0.918

Half-life:

8 days