V-Lab
SEI Select Small CAP ETF GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, September 30th, 2026
1 Day
18.20%
decreased by 0.23%
1 Week
18.56%
increased by 0.13%
1 Month
19.54%
increased by 1.11%
Analysis last updated: Tuesday, September 29, 2026 at 09:31 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 10, 2024 to Sep 25, 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 | 0.1033 | 0.62 |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.8913 | 11.11*** |
| γleverage | 0.1031 | 0.63 |
0.943
Persistence12d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1033 | 0.62 |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8913 | 11.11*** |
γ leverage Additional response to negative shocks | 0.1031 | 0.63 |
Persistence:
0.943
Half-life:
12 days
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