SEI Select Small CAP ETF GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, October 20th, 2026
1 Day
19.42%
decreased by 0.45%
1 Week
19.61%
decreased by 0.26%
1 Month
20.14%
increased by 0.27%
Analysis last updated: Monday, October 19, 2026 at 09:25 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 10, 2024 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 12-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0975 | 0.61 |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.8936 | 11.54*** |
| γleverage | 0.1034 | 0.64 |
0.945
Persistence12d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0975 | 0.61 |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8936 | 11.54*** |
γ leverage Additional response to negative shocks | 0.1034 | 0.64 |
Persistence:
0.945
Half-life:
12 days
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