V-Lab
Korea Stock Exchange KOSPI Index EGARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
39.39%
increased by 0.29%
1 Week
39.18%
increased by 0.08%
1 Month
38.43%
decreased by 0.67%
Analysis last updated: Friday, September 11, 2026 at 09:11 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 67% more than equivalent positive returns.
σ
EGARCH Model
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Leverage: Negative returns increase volatility 67% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0153 | 4.20*** |
| αARCH | 0.1864 | 12.81*** |
| βGARCH | 0.9886 | 442.53*** |
| γleverage | -0.0470 | -3.57*** |
0.989
Persistence61d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0153 | 4.20*** |
α ARCH Response to squared shocks | 0.1864 | 12.81*** |
β GARCH Volatility persistence | 0.9886 | 442.53*** |
γ leverage Additional response to negative shocks | -0.0470 | -3.57*** |
Persistence:
0.989
Half-life:
61 days
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