V-Lab
Russell 1000 Growth Index Asy. Power MEM Volatility Analysis
Volatility prediction for Monday, August 17th, 2026
1 Day
22.72%
decreased by 3.73%
1 Week
21.55%
decreased by 4.90%
1 Month
18.28%
decreased by 8.17%
Analysis last updated: Saturday, August 15, 2026 at 12:08 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 12, 2000 to Aug 14, 2026Model Insight
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 87% more than equivalent positive returns. The volatility power δ = 1.07 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
μ
APMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0372 | 34.18*** |
α ARCH Response to squared shocks | 0.1936 | 50.42*** |
β GARCH Volatility persistence | 0.7895 | 212.57*** |
γ leverage Additional response to negative shocks | 0.2848 | 22.61*** |
δ power Transformation power | 1.0658 | 25.72*** |
Persistence:
0.945
Half-life:
12 days
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