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Stock Exchange of Thailand SET Index MF2-GARCH Volatility Analysis

Volatility prediction for Friday, September 25th, 2026

1 Day

12.87%

increased by 0.02%

1 Week

13.47%

increased by 0.62%

1 Month

14.96%

increased by 2.11%

Analysis last updated: Friday, September 25, 2026 at 05:42 PM UTC

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graph of Stock Exchange of Thailand SET Index MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 265% more than equivalent positive returns.

σ

MF2-GARCH Model

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Leverage: Negative returns increase volatility 265% more than positive returns
ParamValuet-stat
mwindow21
αARCH0.0516
3.46***
βGARCH0.7813
35.29***
γleverage0.1365
4.35***
λ₁tau intercept0.0030
2.57**
λ₂forecast adj.0.0223
3.20***
λ₃tau persistence0.9764
133.42***

0.901

Persistence

7d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

21
α

ARCH

Response to squared shocks

0.0516
3.46***
β

GARCH

Volatility persistence

0.7813
35.29***
γ

leverage

Additional response to negative shocks

0.1365
4.35***
λ₁

tau intercept

Baseline long-term coefficient

0.0030
2.57**
λ₂

forecast adj.

Forecast performance sensitivity

0.0223
3.20***
λ₃

tau persistence

Long-term factor persistence

0.9764
133.42***

Persistence:

0.901

Half-life:

7 days