V-Lab
SRT Marine Systems PLC GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
40.99%
decreased by 0.22%
1 Week
45.11%
increased by 3.90%
1 Month
52.52%
increased by 11.31%
Analysis last updated: Sunday, September 20, 2026 at 04:12 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 2007 to Sep 18, 2026Illiquid Asset
Model Insight
Volatility shocks decay with a half-life of 6 trading days, meaning a shock loses half its impact after approximately 6 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 6-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.5372 | 3.24*** |
| αARCH | 0.0735 | 2.31** |
| βGARCH | 0.7573 | 14.03*** |
| γleverage | 0.1135 | 1.26 |
0.888
Persistence6d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.5372 | 3.24*** |
α ARCH Response to squared shocks | 0.0735 | 2.31** |
β GARCH Volatility persistence | 0.7573 | 14.03*** |
γ leverage Additional response to negative shocks | 0.1135 | 1.26 |
Persistence:
0.888
Half-life:
6 days
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