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V-Lab

Woolworths Holdings Ltd/South Africa GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 5th, 2026

1 Day

30.25%

decreased by 1.64%

1 Week

30.44%

decreased by 1.45%

1 Month

31.04%

decreased by 0.85%

Analysis last updated: Wednesday, August 5, 2026 at 08:03 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Woolworths Holdings Ltd/South Africa GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 3, 1997 to Jul 31, 2026

Model Insight

Volatility shocks decay with a half-life of 23 trading days, meaning a shock loses half its impact after approximately 23 days. Returns follow a Student-t distribution with v = 5.39 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

4.3934
9.37***
α

ARCH

Response to squared shocks

0.0661
20.41***
β

GARCH

Volatility persistence

0.9698
312.84***
ν

DF

Student-t tail thickness

5.3873
5.53***

Persistence:

0.970

Half-life:

23 days