V-Lab
CBOE S&P 500 Left Tail Volatility Index MF2-GARCH Volatility Analysis
Volatility prediction for Thursday, October 1st, 2026
1 Day
149.56%
decreased by 6.89%
1 Week
166.07%
increased by 9.62%
1 Month
187.75%
increased by 31.30%
Analysis last updated: Thursday, October 1, 2026 at 11:30 AM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 2006 to Sep 25, 2026Model Insight
Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days.
σ
MF2-GARCH Model
Tap to view equation
Shock decay: Shocks decay with a 3-day half-life
| Param | Value | t-stat |
|---|---|---|
| mwindow | 101 | |
| αARCH | 0.2541 | 7.22*** |
| βGARCH | 0.5901 | 11.95*** |
| γleverage | -0.1032 | -1.72* |
| λ₁tau intercept | 4.8845 | 0.81 |
| λ₂forecast adj. | 0.1967 | 1.08 |
| λ₃tau persistence | 0.7812 | 3.81*** |
0.793
Persistence3d
Half-lifeσ
MF2-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 101 | |
α ARCH Response to squared shocks | 0.2541 | 7.22*** |
β GARCH Volatility persistence | 0.5901 | 11.95*** |
γ leverage Additional response to negative shocks | -0.1032 | -1.72* |
λ₁ tau intercept Baseline long-term coefficient | 4.8845 | 0.81 |
λ₂ forecast adj. Forecast performance sensitivity | 0.1967 | 1.08 |
λ₃ tau persistence Long-term factor persistence | 0.7812 | 3.81*** |
Persistence:
0.793
Half-life:
3 days
Other CBOE S&P 500 Left Tail Volatility Index Analyses
Other MF2-GARCH Analyses on Volatility Indices