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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

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graph of SEI Select Small CAP ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 10, 2024 to Sep 25, 2026

Model 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
ParamValuet-stat
ωconst0.1033
0.62
αARCH0.0000
0.00
βGARCH0.8913
11.11***
γleverage0.1031
0.63

0.943

Persistence

12d

Half-life
σ

GJR-GARCH Model

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ParameterValuet-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