V-Lab
Korea Stock Exchange KOSPI 200 Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 28th, 2026
1 Day
44.19%
decreased by 0.98%
1 Week
45.95%
increased by 0.78%
1 Month
49.70%
increased by 4.53%
Analysis last updated: Friday, September 25, 2026 at 08:56 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Sep 23, 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 | 0.0268 | 2.93*** |
| βGARCH | 0.8309 | 49.40*** |
| γleverage | 0.1223 | 7.64*** |
| λ₁tau intercept | 0.0028 | 1.60 |
| λ₂forecast adj. | 0.0286 | 4.65*** |
| λ₃tau persistence | 0.9708 | 153.55*** |
0.919
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 | 0.0268 | 2.93*** |
β GARCH Volatility persistence | 0.8309 | 49.40*** |
γ leverage Additional response to negative shocks | 0.1223 | 7.64*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0028 | 1.60 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0286 | 4.65*** |
λ₃ tau persistence Long-term factor persistence | 0.9708 | 153.55*** |
Persistence:
0.919
Half-life:
8 days
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