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V-Lab

S&P Composite 1500 Index EGARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

13.89%

decreased by 0.75%

1 Week

14.08%

decreased by 0.56%

1 Month

14.74%

increased by 0.10%

Analysis last updated: Saturday, September 19, 2026 at 12:01 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P Composite 1500 Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 31, 1994 to Sep 18, 2026

Model Insight

This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.

σ

EGARCH Model

Tap to view equation

Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
ωconst0.0059
0.42
αARCH0.1472
7.71***
βGARCH0.9698
143.57***
γleverage-0.1420
-8.71***

0.970

Persistence

23d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0059
0.42
α

ARCH

Response to squared shocks

0.1472
7.71***
β

GARCH

Volatility persistence

0.9698
143.57***
γ

leverage

Additional response to negative shocks

-0.1420
-8.71***

Persistence:

0.970

Half-life:

23 days