V-Lab
Korea Stock Exchange KOSPI Index EGARCH Volatility Analysis
Volatility prediction for Friday, October 2nd, 2026
1 Day
30.71%
decreased by 0.16%
1 Week
30.71%
decreased by 0.16%
1 Month
30.73%
decreased by 0.14%
Analysis last updated: Thursday, October 1, 2026 at 09:02 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 1, 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 | 0.0154 | 4.22*** |
| αARCH | 0.1872 | 12.86*** |
| βGARCH | 0.9884 | 442.84*** |
| γleverage | -0.0472 | -3.57*** |
0.988
Persistence60d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0154 | 4.22*** |
α ARCH Response to squared shocks | 0.1872 | 12.86*** |
β GARCH Volatility persistence | 0.9884 | 442.84*** |
γ leverage Additional response to negative shocks | -0.0472 | -3.57*** |
Persistence:
0.988
Half-life:
60 days
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