Skip to main content
V-Lab
V-Lab

Russell Midcap Index MEM Volatility Analysis

Volatility prediction for Friday, September 4th, 2026

1 Day

10.86%

decreased by 0.10%

1 Week

11.41%

increased by 0.45%

1 Month

13.09%

increased by 2.13%

Analysis last updated: Friday, September 4, 2026 at 11:26 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Russell Midcap Index MEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 1, 2004 to Aug 27, 2026

Model Insight

Volatility shocks decay with a half-life of 27 trading days, meaning a shock loses half its impact after approximately 27 days.

μ

MEM Model

Tap to view equation

Shock decay: Shocks decay with a 27-day half-life
ParamValuet-stat
ωconst0.0366
2.66***
αARCH0.2576
12.19***
βGARCH0.7171
47.85***

0.975

Persistence

27d

Half-life
μ

MEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0366
2.66***
α

ARCH

Response to squared shocks

0.2576
12.19***
β

GARCH

Volatility persistence

0.7171
47.85***

Persistence:

0.975

Half-life:

27 days