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V-Lab

American Express Co EGARCH Volatility Analysis

Volatility prediction for Thursday, September 10th, 2026

1 Day

25.70%

increased by 1.15%

1 Week

25.99%

increased by 1.44%

1 Month

27.12%

increased by 2.57%

Analysis last updated: Wednesday, September 9, 2026 at 09:32 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of American Express Co EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 4, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 303% more than equivalent positive returns.

σ

EGARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 303% more than positive returns
ParamValuet-stat
ωconst0.0251
2.34**
αARCH0.1355
11.51***
βGARCH0.9860
283.41***
γleverage-0.0817
-6.48***

0.986

Persistence

49d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0251
2.34**
α

ARCH

Response to squared shocks

0.1355
11.51***
β

GARCH

Volatility persistence

0.9860
283.41***
γ

leverage

Additional response to negative shocks

-0.0817
-6.48***

Persistence:

0.986

Half-life:

49 days