V-Lab
Woolworths Holdings Ltd/South Africa GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
28.89%
decreased by 0.73%
1 Week
29.09%
decreased by 0.53%
1 Month
29.76%
increased by 0.14%
Analysis last updated: Wednesday, August 5, 2026 at 08:03 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 3, 1997 to Jul 31, 2026Model 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
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0979 | 18.03*** |
α ARCH Response to squared shocks | 0.0359 | 12.81*** |
β GARCH Volatility persistence | 0.9233 | 376.70*** |
γ leverage Additional response to negative shocks | 0.0367 | 6.76*** |
Persistence:
0.977
Half-life:
30 days
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