V-Lab
Korea Securities Dealers Association KOSDAQ Index GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, August 20th, 2026
1 Day
46.43%
decreased by 4.26%
1 Week
45.99%
decreased by 4.70%
1 Month
44.41%
decreased by 6.28%
Analysis last updated: Wednesday, August 19, 2026 at 09:09 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1997 to Aug 14, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 145% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0865 | 31.46*** |
α ARCH Response to squared shocks | 0.1076 | 22.44*** |
β GARCH Volatility persistence | 0.7949 | 232.57*** |
γ leverage Additional response to negative shocks | 0.1555 | 16.03*** |
Persistence:
0.980
Half-life:
35 days
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