V-Lab
State Street SPDR S&P Metals & Mining ETF MEM Volatility Analysis
Volatility prediction for Tuesday, August 11th, 2026
1 Day
34.69%
decreased by 2.34%
1 Week
34.83%
decreased by 2.20%
1 Month
35.31%
decreased by 1.72%
Analysis last updated: Monday, August 10, 2026 at 09:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 22, 2006 to Aug 7, 2026Model Insight
Volatility shocks decay with a half-life of 41 trading days, meaning a shock loses half its impact after approximately 41 days.
μ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0984 | 6.74*** |
α ARCH Response to squared shocks | 0.1928 | 40.87*** |
β GARCH Volatility persistence | 0.7906 | 247.93*** |
Persistence:
0.983
Half-life:
41 days
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