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Russell 1000 Growth Index GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, October 21st, 2026

1 Day

20.83%

decreased by 0.87%

1 Week

20.77%

decreased by 0.93%

1 Month

20.58%

decreased by 1.12%

Analysis last updated: Wednesday, October 21, 2026 at 09:02 AM UTC

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Date Range:

from

10/20/2024

to

10/20/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Russell 1000 Growth Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 12, 2000 to Oct 16, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

GJR-GARCH Model

Tap to view equation

Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
ωconst0.0221
4.32***
αARCH0.0005
0.03
βGARCH0.9062
84.57***
γleverage0.1556
6.37***

0.985

Persistence

45d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0221
4.32***
α

ARCH

Response to squared shocks

0.0005
0.03
β

GARCH

Volatility persistence

0.9062
84.57***
γ

leverage

Additional response to negative shocks

0.1556
6.37***

Persistence:

0.985

Half-life:

45 days