V-Lab
S&P / ASX 200 Volatility Index EGARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
96.50%
increased by 2.67%
1 Week
99.11%
increased by 5.28%
1 Month
104.23%
increased by 10.40%
Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 2008 to Aug 27, 2026Model Insight
Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days.
σ
EGARCH Model
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Shock decay: Shocks decay with a 5-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.4920 | 4.62*** |
| αARCH | 0.2887 | 5.15*** |
| βGARCH | 0.8720 | 31.10*** |
| γleverage | 0.0246 | 0.39 |
0.872
Persistence5d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4920 | 4.62*** |
α ARCH Response to squared shocks | 0.2887 | 5.15*** |
β GARCH Volatility persistence | 0.8720 | 31.10*** |
γ leverage Additional response to negative shocks | 0.0246 | 0.39 |
Persistence:
0.872
Half-life:
5 days
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