V-Lab
State Street Financial Select Sector SPDR ETF MF2-GARCH Volatility Analysis
Volatility prediction for Wednesday, September 9th, 2026
1 Day
17.21%
increased by 2.57%
1 Week
17.30%
increased by 2.66%
1 Month
17.60%
increased by 2.96%
Analysis last updated: Tuesday, September 8, 2026 at 10:46 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 22, 1998 to Sep 4, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
MF2-GARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| mwindow | 46 | |
| αARCH | 0.0243 | 1.85* |
| βGARCH | 0.8333 | 58.53*** |
| γleverage | 0.1839 | 9.16*** |
| λ₁tau intercept | 0.0076 | 1.73* |
| λ₂forecast adj. | 0.0302 | 2.74*** |
| λ₃tau persistence | 0.9657 | 76.94*** |
0.950
Persistence13d
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 | 0.0243 | 1.85* |
β GARCH Volatility persistence | 0.8333 | 58.53*** |
γ leverage Additional response to negative shocks | 0.1839 | 9.16*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0076 | 1.73* |
λ₂ forecast adj. Forecast performance sensitivity | 0.0302 | 2.74*** |
λ₃ tau persistence Long-term factor persistence | 0.9657 | 76.94*** |
Persistence:
0.950
Half-life:
13 days
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