V-Lab
Hexagon Composites Asa GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
50.99%
decreased by 0.83%
1 Week
51.22%
decreased by 0.60%
1 Month
52.08%
increased by 0.26%
Analysis last updated: Sunday, September 20, 2026 at 02:00 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 18, 1997 to Sep 18, 2026Model Insight
With persistence 0.991, volatility shocks have a half-life of 75 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GJR-GARCH Model
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High persistence: persistence 0.991, shock half-life ~75 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1425 | 3.58*** |
| αARCH | 0.0333 | 3.42*** |
| βGARCH | 0.9532 | 123.88*** |
| γleverage | 0.0086 | 0.58 |
0.991
Persistence75d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1425 | 3.58*** |
α ARCH Response to squared shocks | 0.0333 | 3.42*** |
β GARCH Volatility persistence | 0.9532 | 123.88*** |
γ leverage Additional response to negative shocks | 0.0086 | 0.58 |
Persistence:
0.991
Half-life:
75 days
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