V-Lab
CBOE VIX Indicative Bid Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, August 21st, 2026
1 Day
108.01%
increased by 10.39%
1 Week
109.83%
increased by 12.21%
1 Month
113.94%
increased by 16.32%
Analysis last updated: Friday, August 21, 2026 at 11:34 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 | 17.25*** |
α ARCH Response to squared shocks | 0.1961 | 16.45*** |
β GARCH Volatility persistence | 0.8126 | 151.12*** |
γ leverage Additional response to negative shocks | -0.1961 | -14.87*** |
Persistence:
0.911
Half-life:
7 days
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