State Street Utilities Select Sector SPDR ETF GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 15th, 2026
1 Day
14.60%
decreased by 0.36%
1 Week
14.70%
decreased by 0.26%
1 Month
15.06%
increased by 0.10%
Analysis last updated: Wednesday, October 14, 2026 at 10:39 PM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 22, 1998 to Oct 9, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 203% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
Leverage: Negative returns increase volatility 203% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0207 | 5.56*** |
| αARCH | 0.0340 | 3.08*** |
| βGARCH | 0.9140 | 102.18*** |
| γleverage | 0.0692 | 3.04*** |
0.983
Persistence40d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0207 | 5.56*** |
α ARCH Response to squared shocks | 0.0340 | 3.08*** |
β GARCH Volatility persistence | 0.9140 | 102.18*** |
γ leverage Additional response to negative shocks | 0.0692 | 3.04*** |
Persistence:
0.983
Half-life:
40 days
Other State Street Utilities Select Sector SPDR ETF Analyses
Other GJR-GARCH Analyses on ETFs