V-Lab
African Rainbow Minerals Ltd GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, October 7th, 2026
1 Day
57.52%
1 Week
57.51%
1 Month
57.49%
Analysis last updated: Wednesday, October 7, 2026 at 06:38 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 24, 2006 to Oct 2, 2026Model Insight
With persistence 0.991, volatility shocks have a half-life of 79 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 4.96 degrees of freedom, capturing fatter tails than a normal distribution.
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 12.9676 | 1.31 |
| αARCH | 0.0481 | 7.24*** |
| βGARCH | 0.9913 | 166.85*** |
| νDF | 4.9647 | 2.17** |
0.991
Persistence79d
Half-lifeGAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 12.9676 | 1.31 |
α ARCH Response to squared shocks | 0.0481 | 7.24*** |
β GARCH Volatility persistence | 0.9913 | 166.85*** |
ν DF Student-t tail thickness | 4.9647 | 2.17** |
Persistence:
0.991
Half-life:
79 days
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