V-Lab
Ishares Core Equity ETF PTF MEM Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
14.92%
increased by 1.06%
1 Week
15.12%
increased by 1.26%
1 Month
15.63%
increased by 1.77%
Analysis last updated: Wednesday, August 5, 2026 at 09:20 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 13, 2019 to Jul 31, 2026Model Insight
Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days.
μ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0686 | 6.96*** |
α ARCH Response to squared shocks | 0.3415 | 19.78*** |
β GARCH Volatility persistence | 0.5949 | 56.48*** |
Persistence:
0.936
Half-life:
11 days
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