V-Lab
SMI Volatility Index EGARCH Volatility Analysis
Volatility prediction for Friday, August 7th, 2026
1 Day
62.36%
decreased by 2.38%
1 Week
64.46%
decreased by 0.28%
1 Month
70.93%
increased by 6.19%
Analysis last updated: Friday, August 7, 2026 at 08:39 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 4, 1999 to May 13, 2026Model Insight
This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1851 | 14.58*** |
α ARCH Response to squared shocks | 0.1360 | 24.59*** |
β GARCH Volatility persistence | 0.9450 | 330.29*** |
γ leverage Additional response to negative shocks | 0.1228 | 24.18*** |
Persistence:
0.945
Half-life:
12 days
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