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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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P Composite 1500 Index AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 28, 2004 to Aug 14, 2026

Model 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

ParameterValuet-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