State Street Financial Select Sector SPDR ETF MEM Volatility Analysis
Volatility prediction for Monday, October 12th, 2026
1 Day
14.33%
decreased by 0.31%
1 Week
14.90%
increased by 0.26%
1 Month
16.81%
increased by 2.17%
Analysis last updated: Saturday, October 10, 2026 at 02:06 AM 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
Volatility shocks decay with a half-life of 55 trading days, meaning a shock loses half its impact after approximately 55 days.
μ
MEM Model
Tap to view equation
Shock decay: Shocks decay with a 55-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0432 | 2.32** |
| αARCH | 0.2623 | 12.18*** |
| βGARCH | 0.7252 | 46.29*** |
0.987
Persistence55d
Half-lifeμ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0432 | 2.32** |
α ARCH Response to squared shocks | 0.2623 | 12.18*** |
β GARCH Volatility persistence | 0.7252 | 46.29*** |
Persistence:
0.987
Half-life:
55 days
Other State Street Financial Select Sector SPDR ETF Analyses
Other MEM Analyses on ETFs