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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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE S&P 500 Left Tail Volatility Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 2006 to Aug 7, 2026

Model 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

ParameterValuet-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