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V-Lab

S&P / ASX 200 Volatility Index GJR-GARCH Volatility Analysis

Volatility prediction for Friday, October 9th, 2026

1 Day

89.48%

decreased by 3.93%

1 Week

93.30%

decreased by 0.11%

1 Month

100.80%

increased by 7.39%

Analysis last updated: Saturday, October 10, 2026 at 02:29 AM UTC

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Date Range:

from

10/08/2024

to

10/08/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P / ASX 200 Volatility Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 2008 to Oct 8, 2026
Boundary Parameters

Model Insight

Volatility shocks decay with a half-life of 6 trading days, meaning a shock loses half its impact after approximately 6 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 6-day half-life
ParamValuet-stat
ωconst5.0000
5.59***
αARCH0.1431
3.50***
βGARCH0.7477
22.55***
γleverage0.0008
0.01

0.891

Persistence

6d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
5.59***
α

ARCH

Response to squared shocks

0.1431
3.50***
β

GARCH

Volatility persistence

0.7477
22.55***
γ

leverage

Additional response to negative shocks

0.0008
0.01

Persistence:

0.891

Half-life:

6 days