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V-Lab
V-Lab

Russell 1000 Value Index MEM Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

8.59%

decreased by 0.21%

1 Week

9.19%

increased by 0.39%

1 Month

11.01%

increased by 2.21%

Analysis last updated: Saturday, September 12, 2026 at 12:55 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Russell 1000 Value Index MEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 12, 2000 to Sep 11, 2026

Model Insight

Volatility shocks decay with a half-life of 31 trading days, meaning a shock loses half its impact after approximately 31 days.

μ

MEM Model

Tap to view equation

Shock decay: Shocks decay with a 31-day half-life
ParamValuet-stat
ωconst0.0281
1.62
αARCH0.2403
8.92***
βGARCH0.7375
49.74***

0.978

Persistence

31d

Half-life
μ

MEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0281
1.62
α

ARCH

Response to squared shocks

0.2403
8.92***
β

GARCH

Volatility persistence

0.7375
49.74***

Persistence:

0.978

Half-life:

31 days