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V-Lab

CBOE EFA ETF Volatility Index Asy. MEM Volatility Analysis

Volatility prediction for Wednesday, September 23rd, 2026

1 Day

117.28%

decreased by 9.14%

1 Week

126.37%

decreased by 0.05%

1 Month

155.72%

increased by 29.30%

Analysis last updated: Wednesday, September 23, 2026 at 11:40 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CBOE EFA ETF Volatility Index AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jun 28, 2013 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 67 trading days, meaning a shock loses half its impact after approximately 67 days.

μ

AMEM Model

Tap to view equation

Shock decay: Shocks decay with a 67-day half-life
ParamValuet-stat
ωconst5.0000
4.89***
αARCH0.2480
5.78***
βGARCH0.7480
26.33***
γleverage-0.0124
-0.18

0.990

Persistence

67d

Half-life
μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.0000
4.89***
α

ARCH

Response to squared shocks

0.2480
5.78***
β

GARCH

Volatility persistence

0.7480
26.33***
γ

leverage

Additional response to negative shocks

-0.0124
-0.18

Persistence:

0.990

Half-life:

67 days