V-Lab
Russell 1000 Value Index MEM Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
8.59%
decreased by 0.21%
1 Week
9.19%
increased by 0.39%
1 Month
11.01%
increased by 2.21%
Analysis last updated: Saturday, September 12, 2026 at 12:55 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 12, 2000 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 31 trading days, meaning a shock loses half its impact after approximately 31 days.
μ
MEM Model
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Shock decay: Shocks decay with a 31-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0281 | 1.62 |
| αARCH | 0.2403 | 8.92*** |
| βGARCH | 0.7375 | 49.74*** |
0.978
Persistence31d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0281 | 1.62 |
α ARCH Response to squared shocks | 0.2403 | 8.92*** |
β GARCH Volatility persistence | 0.7375 | 49.74*** |
Persistence:
0.978
Half-life:
31 days
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