V-Lab
Straits Times Index STI MF2-GARCH Volatility Analysis
Volatility prediction for Monday, September 7th, 2026
1 Day
11.39%
increased by 0.15%
1 Week
11.99%
increased by 0.75%
1 Month
13.27%
increased by 2.03%
Analysis last updated: Friday, September 4, 2026 at 11:04 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 4, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 302% more than equivalent positive returns.
σ
MF2-GARCH Model
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Leverage: Negative returns increase volatility 302% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| mwindow | 86 | |
| αARCH | 0.0443 | 4.46*** |
| βGARCH | 0.8135 | 50.21*** |
| γleverage | 0.1337 | 6.56*** |
| λ₁tau intercept | 0.1130 | 3.37*** |
| λ₂forecast adj. | 0.8954 | 14.59*** |
| λ₃tau persistence | 0.0000 | 0.00 |
0.925
Persistence9d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 86 | |
α ARCH Response to squared shocks | 0.0443 | 4.46*** |
β GARCH Volatility persistence | 0.8135 | 50.21*** |
γ leverage Additional response to negative shocks | 0.1337 | 6.56*** |
λ₁ tau intercept Baseline long-term coefficient | 0.1130 | 3.37*** |
λ₂ forecast adj. Forecast performance sensitivity | 0.8954 | 14.59*** |
λ₃ tau persistence Long-term factor persistence | 0.0000 | 0.00 |
Persistence:
0.925
Half-life:
9 days
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