State Street Utilities Select Sector SPDR ETF MF2-GARCH Volatility Analysis
Volatility prediction for Thursday, October 22nd, 2026
1 Day
16.84%
decreased by 0.88%
1 Week
16.91%
decreased by 0.81%
1 Month
17.23%
decreased by 0.49%
Analysis last updated: Wednesday, October 21, 2026 at 09:51 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 22, 1998 to Oct 16, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 293% more than equivalent positive returns.
σ
MF2-GARCH Model
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Leverage: Negative returns increase volatility 293% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| mwindow | 26 | |
| αARCH | 0.0360 | 2.07** |
| βGARCH | 0.7995 | 32.58*** |
| γleverage | 0.1053 | 4.98*** |
| λ₁tau intercept | 0.0105 | 2.40** |
| λ₂forecast adj. | 0.0523 | 3.83*** |
| λ₃tau persistence | 0.9387 | 57.86*** |
0.888
Persistence6d
Half-lifeσ
MF2-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 26 | |
α ARCH Response to squared shocks | 0.0360 | 2.07** |
β GARCH Volatility persistence | 0.7995 | 32.58*** |
γ leverage Additional response to negative shocks | 0.1053 | 4.98*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0105 | 2.40** |
λ₂ forecast adj. Forecast performance sensitivity | 0.0523 | 3.83*** |
λ₃ tau persistence Long-term factor persistence | 0.9387 | 57.86*** |
Persistence:
0.888
Half-life:
6 days
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