V-Lab
CBOE VIX Indicative Ask Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, August 21st, 2026
1 Day
105.92%
increased by 10.49%
1 Week
107.50%
increased by 12.07%
1 Month
110.95%
increased by 15.52%
Analysis last updated: Friday, August 21, 2026 at 11:33 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 18, 2009 to Aug 14, 2026Model Insight
This asset shows a rare inverse leverage effect: volatility responds almost entirely to positive returns, rising far more after gains than after losses. This is the reverse of the usual leverage effect, rare among risky assets.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 15.92*** |
α ARCH Response to squared shocks | 0.2172 | 14.46*** |
β GARCH Volatility persistence | 0.7956 | 132.56*** |
γ leverage Additional response to negative shocks | -0.2172 | -14.87*** |
Persistence:
0.904
Half-life:
7 days
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