CBOE Google Volatility Index GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 21st, 2026
1 Day
98.41%
decreased by 0.44%
1 Week
102.36%
increased by 3.51%
1 Month
111.15%
increased by 12.30%
Analysis last updated: Wednesday, October 21, 2026 at 01:50 PM 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 7, 2011 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
σ
GJR-GARCH Model
Tap to view equation
Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.0000 | 2.32** |
| αARCH | 0.1040 | 1.89* |
| βGARCH | 0.8603 | 20.22*** |
| γleverage | -0.0996 | -1.61 |
0.914
Persistence8d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.0000 | 2.32** |
α ARCH Response to squared shocks | 0.1040 | 1.89* |
β GARCH Volatility persistence | 0.8603 | 20.22*** |
γ leverage Additional response to negative shocks | -0.0996 | -1.61 |
Persistence:
0.914
Half-life:
8 days
Other CBOE Google Volatility Index Analyses
Other GJR-GARCH Analyses on Volatility Indices