V-Lab
Hikma Pharmaceuticals PLC GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 7th, 2026
1 Day
33.12%
decreased by 0.42%
1 Week
34.16%
increased by 0.62%
1 Month
36.48%
increased by 2.94%
Analysis last updated: Wednesday, October 7, 2026 at 06:46 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 2, 2006 to Oct 2, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.5253 | 1.96* |
| αARCH | 0.0399 | 2.09** |
| βGARCH | 0.8576 | 18.60*** |
| γleverage | 0.0328 | 0.86 |
0.914
Persistence8d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.5253 | 1.96* |
α ARCH Response to squared shocks | 0.0399 | 2.09** |
β GARCH Volatility persistence | 0.8576 | 18.60*** |
γ leverage Additional response to negative shocks | 0.0328 | 0.86 |
Persistence:
0.914
Half-life:
8 days
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