V-Lab
Dow Jones South Africa Index GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
18.66%
increased by 1.30%
1 Week
18.66%
increased by 1.30%
1 Month
18.64%
increased by 1.28%
Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1992 to Aug 27, 2026Model Insight
Volatility shocks decay with a half-life of 38 trading days, meaning a shock loses half its impact after approximately 38 days.
σ
GARCH Model
Tap to view equation
Shock decay: Shocks decay with a 38-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0244 | 5.94*** |
| αARCH | 0.0859 | 9.12*** |
| βGARCH | 0.8961 | 82.27*** |
0.982
Persistence38d
Half-lifeσ
GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0244 | 5.94*** |
α ARCH Response to squared shocks | 0.0859 | 9.12*** |
β GARCH Volatility persistence | 0.8961 | 82.27*** |
Persistence:
0.982
Half-life:
38 days
Other Dow Jones South Africa Index Analyses
Other GARCH Analyses on Equity Indices