V-Lab
Stock Exchange of Thailand SET 50 Index MF2-GARCH Volatility Analysis
Volatility prediction for Friday, September 18th, 2026
1 Day
12.60%
increased by 0.26%
1 Week
12.87%
increased by 0.53%
1 Month
13.71%
increased by 1.37%
Analysis last updated: Friday, September 18, 2026 at 09:54 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 16, 1995 to Sep 10, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 176% more than equivalent positive returns.
σ
MF2-GARCH Model
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Leverage: Negative returns increase volatility 176% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| mwindow | 46 | |
| αARCH | 0.0526 | 3.18*** |
| βGARCH | 0.8670 | 43.73*** |
| γleverage | 0.0923 | 3.21*** |
| λ₁tau intercept | 0.0001 | 0.12 |
| λ₂forecast adj. | 0.0047 | 1.49 |
| λ₃tau persistence | 0.9952 | 293.30*** |
0.966
Persistence20d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 46 | |
α ARCH Response to squared shocks | 0.0526 | 3.18*** |
β GARCH Volatility persistence | 0.8670 | 43.73*** |
γ leverage Additional response to negative shocks | 0.0923 | 3.21*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0001 | 0.12 |
λ₂ forecast adj. Forecast performance sensitivity | 0.0047 | 1.49 |
λ₃ tau persistence Long-term factor persistence | 0.9952 | 293.30*** |
Persistence:
0.966
Half-life:
20 days
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