V-Lab
Dow Jones South Africa Index EGARCH Volatility Analysis
Volatility prediction for Friday, July 31st, 2026
1 Day
15.68%
decreased by 0.04%
1 Week
15.86%
increased by 0.14%
1 Month
16.47%
increased by 0.75%
Analysis last updated: Friday, July 31, 2026 at 08:05 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1992 to Apr 30, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 166% more than equivalent positive returns.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0108 | 6.44*** |
α ARCH Response to squared shocks | 0.1620 | 36.56*** |
β GARCH Volatility persistence | 0.9727 | 825.05*** |
γ leverage Additional response to negative shocks | -0.0734 | -17.93*** |
Persistence:
0.973
Half-life:
25 days
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