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V-Lab

State Street SPDR Portfolio S&P 500 Value ETF MF2-GARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

10.13%

decreased by 0.43%

1 Week

10.39%

decreased by 0.17%

1 Month

11.03%

increased by 0.47%

Analysis last updated: Friday, September 11, 2026 at 11:55 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of State Street SPDR Portfolio S&P 500 Value ETF MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 2, 2000 to Sep 11, 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

Tap to view equation

Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
mwindow71
αARCH0.0000
0.00
βGARCH0.8517
74.99***
γleverage0.1969
12.36***
λ₁tau intercept0.0118
1.79*
λ₂forecast adj.0.0590
3.21***
λ₃tau persistence0.9282
41.27***

0.950

Persistence

14d

Half-life
σ

MF2-GARCH Model

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ParameterValuet-statistic
m

window

Rolling window length

71
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8517
74.99***
γ

leverage

Additional response to negative shocks

0.1969
12.36***
λ₁

tau intercept

Baseline long-term coefficient

0.0118
1.79*
λ₂

forecast adj.

Forecast performance sensitivity

0.0590
3.21***
λ₃

tau persistence

Long-term factor persistence

0.9282
41.27***

Persistence:

0.950

Half-life:

14 days