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V-Lab

S&P 500 Growth Index MF2-GARCH Volatility Analysis

Volatility prediction for Friday, July 31st, 2026

1 Day

22.72%

decreased by 1.31%

1 Week

22.75%

decreased by 1.28%

1 Month

22.76%

decreased by 1.27%

Analysis last updated: Thursday, July 30, 2026 at 11:06 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of S&P 500 Growth Index MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 29, 1992 to Jul 24, 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

ParameterValuet-statistic
m

window

Rolling window length

61
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8401
249.36***
γ

leverage

Additional response to negative shocks

0.2027
48.91***
λ₁

tau intercept

Baseline long-term coefficient

0.0123
6.66***
λ₂

forecast adj.

Forecast performance sensitivity

0.0791
6.47***
λ₃

tau persistence

Long-term factor persistence

0.9118
69.62***

Persistence:

0.941

Half-life:

11 days