V-Lab
CBOE S&P 500 Left Tail Volatility Index EGARCH Volatility Analysis
Volatility prediction for Friday, August 14th, 2026
1 Day
157.10%
decreased by 12.35%
1 Week
166.96%
decreased by 2.49%
1 Month
199.29%
increased by 29.84%
Analysis last updated: Friday, August 14, 2026 at 11:30 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 2006 to Aug 7, 2026Model Insight
Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3208 | 20.22*** |
α ARCH Response to squared shocks | 0.3220 | 34.57*** |
β GARCH Volatility persistence | 0.9437 | 332.17*** |
γ leverage Additional response to negative shocks | -0.0057 | -0.58 |
Persistence:
0.944
Half-life:
12 days
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