V-Lab
Ghana Stock Exchange Composite Index GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
9.50%
decreased by 0.08%
1 Week
9.93%
increased by 0.35%
1 Month
10.94%
increased by 1.36%
Analysis last updated: Saturday, September 12, 2026 at 12:50 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 4, 2011 to Sep 10, 2026Model Insight
Volatility shocks decay with a half-life of 9 trading days, meaning a shock loses half its impact after approximately 9 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 9-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0445 | 2.93*** |
| αARCH | 0.1409 | 2.83*** |
| βGARCH | 0.8037 | 18.56*** |
| γleverage | -0.0384 | -0.50 |
0.925
Persistence9d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0445 | 2.93*** |
α ARCH Response to squared shocks | 0.1409 | 2.83*** |
β GARCH Volatility persistence | 0.8037 | 18.56*** |
γ leverage Additional response to negative shocks | -0.0384 | -0.50 |
Persistence:
0.925
Half-life:
9 days
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