V-Lab
S&P Composite 1500 Index Asy. MEM Volatility Analysis
Volatility prediction for Wednesday, September 2nd, 2026
1 Day
10.39%
decreased by 0.68%
1 Week
10.83%
decreased by 0.24%
1 Month
12.17%
increased by 1.10%
Analysis last updated: Wednesday, September 2, 2026 at 12:05 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 28, 2004 to Aug 14, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 211% more than equivalent positive returns.
μ
AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0300 | 29.18*** |
α ARCH Response to squared shocks | 0.1063 | 13.73*** |
β GARCH Volatility persistence | 0.7553 | 150.06*** |
γ leverage Additional response to negative shocks | 0.2242 | 20.45*** |
Persistence:
0.974
Half-life:
26 days
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