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V-Lab

Johnson & Johnson GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

21.56%

decreased by 0.80%

1 Week

21.63%

decreased by 0.73%

1 Month

21.92%

decreased by 0.44%

Analysis last updated: Tuesday, August 25, 2026 at 09:44 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Johnson & Johnson GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 21, 2026

Model Insight

With persistence 0.990, volatility shocks have a half-life of 70 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 175% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0246
19.71***
α

ARCH

Response to squared shocks

0.0423
18.88***
β

GARCH

Volatility persistence

0.9110
476.99***
γ

leverage

Additional response to negative shocks

0.0738
12.95***

Persistence:

0.990

Half-life:

70 days