V-Lab
Russell 1000 Growth Index Asy. MEM Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
12.16%
increased by 0.08%
1 Week
12.49%
increased by 0.41%
1 Month
13.58%
increased by 1.50%
Analysis last updated: Friday, September 11, 2026 at 09:03 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 12, 2000 to Sep 4, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 190% more than equivalent positive returns.
μ
AMEM Model
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Leverage: Negative returns increase volatility 190% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0282 | 6.97*** |
| αARCH | 0.0929 | 4.10*** |
| βGARCH | 0.7989 | 61.81*** |
| γleverage | 0.1760 | 5.32*** |
0.980
Persistence34d
Half-lifeμ
AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0282 | 6.97*** |
α ARCH Response to squared shocks | 0.0929 | 4.10*** |
β GARCH Volatility persistence | 0.7989 | 61.81*** |
γ leverage Additional response to negative shocks | 0.1760 | 5.32*** |
Persistence:
0.980
Half-life:
34 days
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