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
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 29, 1992 to Jul 24, 2026Model 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
| Parameter | Value | t-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
Other S&P 500 Growth Index Analyses
Other MF2-GARCH Analyses on Equity Indices