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V-Lab

CBOE S&P 500 One-Year Volatility Index EGARCH Volatility Analysis

Volatility prediction for Monday, August 10th, 2026

1 Day

24.74%

decreased by 0.38%

1 Week

27.22%

increased by 2.10%

1 Month

33.19%

increased by 8.07%

Analysis last updated: Monday, August 10, 2026 at 11:38 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of CBOE S&P 500 One-Year Volatility Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 2007 to Aug 7, 2026

Model Insight

This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 199% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.

σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.2014
21.75***
α

ARCH

Response to squared shocks

0.3410
16.41***
β

GARCH

Volatility persistence

0.8885
184.00***
γ

leverage

Additional response to negative shocks

0.1700
10.15***

Persistence:

0.889

Half-life:

6 days