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V-Lab

iShares Russell 3000 ETF GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

11.53%

decreased by 0.19%

1 Week

11.84%

increased by 0.12%

1 Month

12.88%

increased by 1.16%

Analysis last updated: Monday, August 24, 2026 at 09:39 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of iShares Russell 3000 ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 29, 2000 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0269
16.96***
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8854
339.37***
γ

leverage

Additional response to negative shocks

0.1840
26.05***

Persistence:

0.977

Half-life:

30 days