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V-Lab

iShares Russell 3000 ETF GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, July 21st, 2026

1 Day

12.62%

decreased by 0.39%

1 Week

12.86%

decreased by 0.15%

1 Month

13.67%

increased by 0.66%

Analysis last updated: Monday, July 20, 2026 at 09:43 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 Jul 17, 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

0.0268
16.91***
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8859
340.33***
γ

leverage

Additional response to negative shocks

0.1831
25.92***

Persistence:

0.977

Half-life:

30 days