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V-Lab

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

Volatility prediction for Friday, August 21st, 2026

1 Day

78.70%

decreased by 1.14%

1 Week

85.31%

increased by 5.47%

1 Month

97.83%

increased by 17.99%

Analysis last updated: Friday, August 21, 2026 at 08:16 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 Apr 4, 2025

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

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
20.24***
α

ARCH

Response to squared shocks

0.1268
13.02***
β

GARCH

Volatility persistence

0.7611
86.93***
γ

leverage

Additional response to negative shocks

0.0122
0.53

Persistence:

0.894

Half-life:

6 days