Straits Times Index STI MF2-GARCH Volatility Analysis
Volatility prediction for Friday, October 16th, 2026
1 Day
18.94%
decreased by 1.50%
1 Week
18.48%
decreased by 1.96%
1 Month
17.44%
decreased by 3.00%
Analysis last updated: Thursday, October 15, 2026 at 10:04 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Oct 9, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 304% more than equivalent positive returns.
σ
MF2-GARCH Model
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Leverage: Negative returns increase volatility 304% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| mwindow | 86 | |
| αARCH | 0.0447 | 4.48*** |
| βGARCH | 0.8116 | 49.44*** |
| γleverage | 0.1356 | 6.59*** |
| λ₁tau intercept | 0.1138 | 3.37*** |
| λ₂forecast adj. | 0.8957 | 14.49*** |
| λ₃tau persistence | 0.0000 | 0.00 |
0.924
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 | 0.0447 | 4.48*** |
β GARCH Volatility persistence | 0.8116 | 49.44*** |
γ leverage Additional response to negative shocks | 0.1356 | 6.59*** |
λ₁ tau intercept Baseline long-term coefficient | 0.1138 | 3.37*** |
λ₂ forecast adj. Forecast performance sensitivity | 0.8957 | 14.49*** |
λ₃ tau persistence Long-term factor persistence | 0.0000 | 0.00 |
Persistence:
0.924
Half-life:
9 days
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