V-Lab
Korea Stock Exchange KOSPI 200 Index MF2-GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
57.29%
decreased by 2.53%
1 Week
57.93%
decreased by 1.89%
1 Month
59.46%
decreased by 0.36%
Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Aug 27, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
MF2-GARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| mwindow | 21 | |
| αARCH | 0.0255 | 2.78*** |
| βGARCH | 0.8281 | 47.93*** |
| γleverage | 0.1239 | 7.66*** |
| λ₁tau intercept | 0.0029 | 1.59 |
| λ₂forecast adj. | 0.0306 | 4.76*** |
| λ₃tau persistence | 0.9689 | 148.23*** |
0.916
Persistence8d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 21 | |
α ARCH Response to squared shocks | 0.0255 | 2.78*** |
β GARCH Volatility persistence | 0.8281 | 47.93*** |
γ leverage Additional response to negative shocks | 0.1239 | 7.66*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0029 | 1.59 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0306 | 4.76*** |
λ₃ tau persistence Long-term factor persistence | 0.9689 | 148.23*** |
Persistence:
0.916
Half-life:
8 days
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