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V-Lab

Johnson & Johnson Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

21.59%

decreased by 0.95%

1 Week

21.56%

decreased by 0.98%

1 Month

21.46%

decreased by 1.08%

Analysis last updated: Tuesday, August 25, 2026 at 09:45 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Johnson & Johnson S0GARCH

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

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 12 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.2362
11.23***
α

ARCH

Response to squared shocks

0.0885
7.73***
β

GARCH

Volatility persistence

0.8565
49.46***
γi Spline Coefficients
K=5
γ10.0080
1.22
γ2-0.0298
-2.78***
γ30.0450
4.83***
γ4-0.0255
-2.75***
γ5-0.0020
-0.30

Persistence:

0.945

Half-life:

12 days