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Proshares S&P 500 EX-Technology ETF MF2-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 29th, 2026

1 Day

12.41%

increased by 1.39%

1 Week

12.53%

increased by 1.51%

1 Month

12.84%

increased by 1.82%

Analysis last updated: Monday, September 28, 2026 at 09:55 PM UTC

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graph of Proshares S&P 500 EX-Technology ETF MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 24, 2015 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
mwindow46
αARCH0.0043
0.11
βGARCH0.7844
19.36***
γleverage0.2361
5.12***
λ₁tau intercept0.0308
1.04
λ₂forecast adj.0.0666
1.32
λ₃tau persistence0.8965
11.51***

0.907

Persistence

7d

Half-life
σ

MF2-GARCH Model

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ParameterValuet-statistic
m

window

Rolling window length

46
α

ARCH

Response to squared shocks

0.0043
0.11
β

GARCH

Volatility persistence

0.7844
19.36***
γ

leverage

Additional response to negative shocks

0.2361
5.12***
λ₁

tau intercept

Baseline long-term coefficient

0.0308
1.04
λ₂

forecast adj.

Forecast performance sensitivity

0.0666
1.32
λ₃

tau persistence

Long-term factor persistence

0.8965
11.51***

Persistence:

0.907

Half-life:

7 days