V-Lab
Blom Stock Index EGARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
24.02%
increased by 3.25%
1 Week
24.14%
increased by 3.37%
1 Month
24.46%
increased by 3.69%
Analysis last updated: Friday, September 4, 2026 at 11:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 19, 1996 to Aug 27, 2026Model Insight
Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days.
σ
EGARCH Model
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Shock decay: Shocks decay with a 11-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0570 | 4.74*** |
| αARCH | 0.4566 | 11.00*** |
| βGARCH | 0.9374 | 110.84*** |
| γleverage | 0.0171 | 0.42 |
0.937
Persistence11d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0570 | 4.74*** |
α ARCH Response to squared shocks | 0.4566 | 11.00*** |
β GARCH Volatility persistence | 0.9374 | 110.84*** |
γ leverage Additional response to negative shocks | 0.0171 | 0.42 |
Persistence:
0.937
Half-life:
11 days
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