V-Lab
Hexagon Composites Asa GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
68.73%
decreased by 0.01%
1 Week
68.63%
decreased by 0.11%
1 Month
68.27%
decreased by 0.47%
Analysis last updated: Sunday, August 23, 2026 at 01:16 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 18, 1997 to Aug 21, 2026Model Insight
With persistence 0.992, volatility shocks have a half-life of 81 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 23% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1330 | 14.24*** |
α ARCH Response to squared shocks | 0.0327 | 13.65*** |
β GARCH Volatility persistence | 0.9551 | 511.03*** |
γ leverage Additional response to negative shocks | 0.0075 | 2.07** |
Persistence:
0.992
Half-life:
81 days
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