SEI Select Small CAP ETF Asy. MEM Volatility Analysis
Volatility prediction for Monday, October 19th, 2026
1 Day
21.43%
increased by 4.62%
1 Week
21.25%
increased by 4.44%
1 Month
20.83%
increased by 4.02%
Analysis last updated: Friday, October 16, 2026 at 10:11 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 11, 2024 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days.
μ
AMEM Model
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Shock decay: Shocks decay with a 7-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1480 | 2.30** |
| αARCH | 0.0171 | 0.61 |
| βGARCH | 0.7943 | 17.09*** |
| γleverage | 0.1965 | 1.70* |
0.910
Persistence7d
Half-lifeμ
AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1480 | 2.30** |
α ARCH Response to squared shocks | 0.0171 | 0.61 |
β GARCH Volatility persistence | 0.7943 | 17.09*** |
γ leverage Additional response to negative shocks | 0.1965 | 1.70* |
Persistence:
0.910
Half-life:
7 days
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