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V-Lab

CBOE EFA ETF Volatility Index MEM Volatility Analysis

Volatility prediction for Friday, August 7th, 2026

1 Day

115.36%

increased by 5.21%

1 Week

124.75%

increased by 14.60%

1 Month

155.08%

increased by 44.93%

Analysis last updated: Friday, August 7, 2026 at 11:36 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE EFA ETF Volatility Index MEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jun 28, 2013 to Jul 31, 2026

Model Insight

With persistence 0.991, volatility shocks have a half-life of 75 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

μ

MEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
7.65***
α

ARCH

Response to squared shocks

0.2423
25.82***
β

GARCH

Volatility persistence

0.7486
108.03***

Persistence:

0.991

Half-life:

75 days