V-Lab
Korea Stock Exchange KOSPI Index MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
42.76%
decreased by 0.82%
1 Week
44.42%
increased by 0.84%
1 Month
48.02%
increased by 4.44%
Analysis last updated: Friday, September 18, 2026 at 09:10 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 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 | 0.0304 | 2.97*** |
| βGARCH | 0.8067 | 46.20*** |
| γleverage | 0.1495 | 8.49*** |
| λ₁tau intercept | 0.0025 | 1.60 |
| λ₂forecast adj. | 0.0296 | 4.54*** |
| λ₃tau persistence | 0.9698 | 144.86*** |
0.912
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 | 0.0304 | 2.97*** |
β GARCH Volatility persistence | 0.8067 | 46.20*** |
γ leverage Additional response to negative shocks | 0.1495 | 8.49*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0025 | 1.60 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0296 | 4.54*** |
λ₃ tau persistence Long-term factor persistence | 0.9698 | 144.86*** |
Persistence:
0.912
Half-life:
8 days
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