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SEI Select Small CAP ETF MF2-GARCH Volatility Analysis

Volatility prediction for Wednesday, September 30th, 2026

1 Day

15.32%

decreased by 0.32%

1 Week

15.33%

decreased by 0.31%

1 Month

15.60%

decreased by 0.04%

Analysis last updated: Tuesday, September 29, 2026 at 09:31 PM UTC

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graph of SEI Select Small CAP ETF MF2-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

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

MF2-GARCH Model

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Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
mwindow41
αARCH0.0000
0.00
βGARCH0.8625
37.78***
γleverage0.1133
4.80***
λ₁tau intercept0.0816
2.07**
λ₂forecast adj.0.0912
2.39**
λ₃tau persistence0.8435
16.91***

0.919

Persistence

8d

Half-life
σ

MF2-GARCH Model

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ParameterValuet-statistic
m

window

Rolling window length

41
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8625
37.78***
γ

leverage

Additional response to negative shocks

0.1133
4.80***
λ₁

tau intercept

Baseline long-term coefficient

0.0816
2.07**
λ₂

forecast adj.

Forecast performance sensitivity

0.0912
2.39**
λ₃

tau persistence

Long-term factor persistence

0.8435
16.91***

Persistence:

0.919

Half-life:

8 days