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V-Lab

NASDAQ Composite Index EGARCH Volatility Analysis

Volatility prediction for Wednesday, September 23rd, 2026

1 Day

15.14%

decreased by 0.66%

1 Week

15.42%

decreased by 0.38%

1 Month

16.42%

increased by 0.62%

Analysis last updated: Wednesday, September 23, 2026 at 12:04 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of NASDAQ Composite Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 18, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 245% more than equivalent positive returns.

σ

EGARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 245% more than positive returns
ParamValuet-stat
ωconst0.0161
2.53**
αARCH0.1712
11.71***
βGARCH0.9755
278.63***
γleverage-0.0943
-6.61***

0.975

Persistence

28d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0161
2.53**
α

ARCH

Response to squared shocks

0.1712
11.71***
β

GARCH

Volatility persistence

0.9755
278.63***
γ

leverage

Additional response to negative shocks

-0.0943
-6.61***

Persistence:

0.975

Half-life:

28 days