V-Lab
Heungkuk Fire & Marine Insurance Co Ltd GJR-GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Monday, August 24th, 2026
1 Day
37.44%
decreased by 1.99%
1 Week
38.10%
decreased by 1.33%
1 Month
40.64%
increased by 1.21%
Analysis last updated: Sunday, August 23, 2026 at 12:13 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Aug 21, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 1386294 trading days (~5501.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0989 | 22.30*** |
α ARCH Response to squared shocks | 0.1364 | 23.69*** |
β GARCH Volatility persistence | 0.8699 | 291.90*** |
γ leverage Additional response to negative shocks | -0.0125 | -1.47 |
Persistence:
1.000
Half-life:
1386294 days
Other Heungkuk Fire & Marine Insurance Co Ltd Analyses
Other GJR-GARCH Analyses on International Equities