V-Lab
Han Kook Capital Co Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
24.57%
decreased by 1.38%
1 Week
25.49%
decreased by 0.46%
1 Month
28.70%
increased by 2.75%
Analysis last updated: Friday, September 11, 2026 at 08:33 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 26, 2001 to Sep 4, 2026Model Insight
With persistence 0.992, volatility shocks have a half-life of 90 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GJR-GARCH Model
Tap to view equation
High persistence: persistence 0.992, shock half-life ~90 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1100 | 3.58*** |
| αARCH | 0.1523 | 3.77*** |
| βGARCH | 0.8545 | 34.18*** |
| γleverage | -0.0291 | -0.58 |
0.992
Persistence90d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1100 | 3.58*** |
α ARCH Response to squared shocks | 0.1523 | 3.77*** |
β GARCH Volatility persistence | 0.8545 | 34.18*** |
γ leverage Additional response to negative shocks | -0.0291 | -0.58 |
Persistence:
0.992
Half-life:
90 days
Other Han Kook Capital Co Ltd Analyses
Other GJR-GARCH Analyses on International Equities