V-Lab
S&P / ASX 200 Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
80.90%
decreased by 1.51%
1 Week
86.97%
increased by 4.56%
1 Month
98.56%
increased by 16.15%
Analysis last updated: Friday, July 24, 2026 at 11:21 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 2008 to Apr 4, 2025Model 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
| Parameter | Value | t-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
Other S&P / ASX 200 Volatility Index Analyses
Other GJR-GARCH Analyses on Volatility Indices