V-Lab
CBOE Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, August 21st, 2026
1 Day
101.28%
increased by 11.44%
1 Week
101.62%
increased by 11.78%
1 Month
102.32%
increased by 12.48%
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
Jan 2, 1990 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 | 4.7057 | 19.88*** |
α ARCH Response to squared shocks | 0.2064 | 19.94*** |
β GARCH Volatility persistence | 0.7849 | 145.55*** |
γ leverage Additional response to negative shocks | -0.2064 | -19.41*** |
Persistence:
0.888
Half-life:
6 days
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