iShares Global Clean Energy Index ETF MEM Volatility Analysis
Volatility prediction for Tuesday, July 21st, 2026
1 Day
48.21%
decreased by 2.22%
1 Week
47.41%
decreased by 3.02%
1 Month
44.98%
decreased by 5.45%
Analysis last updated: Tuesday, July 21, 2026 at 12:25 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 3, 2022 to Jul 17, 2026Model Insight
Volatility shocks decay with a half-life of 14 trading days, meaning a shock loses half its impact after approximately 14 days.
μ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2983 | 3.67*** |
α ARCH Response to squared shocks | 0.0712 | 3.77*** |
β GARCH Volatility persistence | 0.8791 | 71.44*** |
Persistence:
0.950
Half-life:
14 days
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