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Woolworths Holdings Ltd/South Africa GJR-GARCH Volatility Analysis

Volatility prediction for Friday, September 11th, 2026

1 Day

32.14%

increased by 2.38%

1 Week

32.18%

increased by 2.42%

1 Month

32.31%

increased by 2.55%

Analysis last updated: Friday, September 11, 2026 at 09:11 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 Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 31 trading days, meaning a shock loses half its impact after approximately 31 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 31-day half-life
ParamValuet-stat
ωconst0.0966
4.50***
αARCH0.0359
3.21***
βGARCH0.9238
94.82***
γleverage0.0359
1.67*

0.978

Persistence

31d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0966
4.50***
α

ARCH

Response to squared shocks

0.0359
3.21***
β

GARCH

Volatility persistence

0.9238
94.82***
γ

leverage

Additional response to negative shocks

0.0359
1.67*

Persistence:

0.978

Half-life:

31 days