Russell 1000 Growth Index MEM Volatility Analysis
Volatility prediction for Monday, November 2nd, 2026
1 Day
20.04%
increased by 2.26%
1 Week
20.10%
increased by 2.32%
1 Month
20.32%
increased by 2.54%
Analysis last updated: Saturday, October 31, 2026 at 08:56 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 12, 2000 to Oct 30, 2026Model Insight
Volatility shocks decay with a half-life of 44 trading days, meaning a shock loses half its impact after approximately 44 days.
μ
MEM Model
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Shock decay: Shocks decay with a 44-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0300 | 2.23** |
| αARCH | 0.2314 | 12.14*** |
| βGARCH | 0.7528 | 60.68*** |
0.984
Persistence44d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0300 | 2.23** |
α ARCH Response to squared shocks | 0.2314 | 12.14*** |
β GARCH Volatility persistence | 0.7528 | 60.68*** |
Persistence:
0.984
Half-life:
44 days
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