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V-Lab

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

Volatility prediction for Friday, September 4th, 2026

1 Day

92.42%

increased by 1.68%

1 Week

95.61%

increased by 4.87%

1 Month

101.92%

increased by 11.18%

Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC

Date Range:

from

to

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 Aug 27, 2026

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
5.58***
αARCH0.1446
3.51***
βGARCH0.7471
22.53***
γleverage-0.0003
0.00

0.892

Persistence

6d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
5.58***
α

ARCH

Response to squared shocks

0.1446
3.51***
β

GARCH

Volatility persistence

0.7471
22.53***
γ

leverage

Additional response to negative shocks

-0.0003
0.00

Persistence:

0.892

Half-life:

6 days