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V-Lab

Woolworths Holdings Ltd/South Africa AGARCH Volatility Analysis

Volatility prediction for Monday, August 17th, 2026

1 Day

29.42%

decreased by 1.14%

1 Week

29.71%

decreased by 0.85%

1 Month

30.59%

increased by 0.03%

Analysis last updated: Sunday, August 16, 2026 at 01:08 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Woolworths Holdings Ltd/South Africa AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 3, 1997 to Aug 14, 2026

Model Insight

The news-impact curve is shifted (γ = 0.37) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.

σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1646
21.93***
α

ARCH

Response to squared shocks

0.0774
38.02***
β

GARCH

Volatility persistence

0.8819
305.47***
γ

leverage

Additional response to negative shocks

0.3725
9.04***

Persistence:

0.959

Half-life:

17 days