V-Lab
Korea Cast Iron Pipe Industries Co Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
18.00%
decreased by 0.30%
1 Week
18.81%
increased by 0.51%
1 Month
21.64%
increased by 3.34%
Analysis last updated: Sunday, September 20, 2026 at 12:35 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Sep 18, 2026Model Insight
With persistence 0.993, volatility shocks have a half-life of 97 trading days (~0.4 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 0.993, shock half-life ~97 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0691 | 4.36*** |
| αARCH | 0.0976 | 5.42*** |
| βGARCH | 0.9137 | 94.87*** |
| γleverage | -0.0369 | -1.29 |
0.993
Persistence97d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0691 | 4.36*** |
α ARCH Response to squared shocks | 0.0976 | 5.42*** |
β GARCH Volatility persistence | 0.9137 | 94.87*** |
γ leverage Additional response to negative shocks | -0.0369 | -1.29 |
Persistence:
0.993
Half-life:
97 days
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