V-Lab
S&P/ASX 200 EGARCH Volatility Analysis
Volatility prediction for Friday, September 25th, 2026
1 Day
12.28%
increased by 0.85%
1 Week
12.38%
increased by 0.95%
1 Month
12.72%
increased by 1.29%
Analysis last updated: Thursday, September 24, 2026 at 07:02 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 29, 1992 to Sep 18, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
EGARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| ωconst | -0.0054 | -0.95 |
| αARCH | 0.1407 | 9.28*** |
| βGARCH | 0.9736 | 220.92*** |
| γleverage | -0.1017 | -7.89*** |
0.974
Persistence26d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | -0.0054 | -0.95 |
α ARCH Response to squared shocks | 0.1407 | 9.28*** |
β GARCH Volatility persistence | 0.9736 | 220.92*** |
γ leverage Additional response to negative shocks | -0.1017 | -7.89*** |
Persistence:
0.974
Half-life:
26 days
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