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V-Lab

S&P MidCap 400 Index MF2-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 8th, 2026

1 Day

14.48%

decreased by 0.58%

1 Week

14.69%

decreased by 0.37%

1 Month

15.25%

increased by 0.19%

Analysis last updated: Friday, September 4, 2026 at 11:32 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P MidCap 400 Index MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 4, 2026
Stationarity Enforced

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
mwindow61
αARCH0.0038
0.50
βGARCH0.8578
86.15***
γleverage0.1707
12.61***
λ₁tau intercept0.0049
1.99**
λ₂forecast adj.0.0327
3.54***
λ₃tau persistence0.9634
91.02***

0.947

Persistence

13d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

61
α

ARCH

Response to squared shocks

0.0038
0.50
β

GARCH

Volatility persistence

0.8578
86.15***
γ

leverage

Additional response to negative shocks

0.1707
12.61***
λ₁

tau intercept

Baseline long-term coefficient

0.0049
1.99**
λ₂

forecast adj.

Forecast performance sensitivity

0.0327
3.54***
λ₃

tau persistence

Long-term factor persistence

0.9634
91.02***

Persistence:

0.947

Half-life:

13 days