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V-Lab

Woolworths Holdings Ltd/South Africa GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, August 25th, 2026

1 Day

28.20%

decreased by 0.32%

1 Week

28.43%

decreased by 0.09%

1 Month

29.21%

increased by 0.69%

Analysis last updated: Tuesday, August 25, 2026 at 08:13 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Woolworths Holdings Ltd/South Africa GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 3, 1997 to Aug 21, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 102% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0967
18.01***
α

ARCH

Response to squared shocks

0.0356
12.79***
β

GARCH

Volatility persistence

0.9239
379.91***
γ

leverage

Additional response to negative shocks

0.0362
6.72***

Persistence:

0.978

Half-life:

31 days