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V-Lab

American Express Co MF2-GARCH Volatility Analysis

Volatility prediction for Wednesday, September 16th, 2026

1 Day

22.79%

increased by 0.27%

1 Week

23.28%

increased by 0.76%

1 Month

24.75%

increased by 2.23%

Analysis last updated: Tuesday, September 15, 2026 at 09:21 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of American Express Co MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 11, 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

MF2-GARCH Model

Tap to view equation

Leverage: volatility responds almost entirely to negative shocks
ParamValuet-stat
mwindow66
αARCH0.0084
1.47
βGARCH0.8849
88.13***
γleverage0.1366
9.73***
λ₁tau intercept0.0109
1.60
λ₂forecast adj.0.0273
2.87***
λ₃tau persistence0.9701
92.64***

0.962

Persistence

18d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

66
α

ARCH

Response to squared shocks

0.0084
1.47
β

GARCH

Volatility persistence

0.8849
88.13***
γ

leverage

Additional response to negative shocks

0.1366
9.73***
λ₁

tau intercept

Baseline long-term coefficient

0.0109
1.60
λ₂

forecast adj.

Forecast performance sensitivity

0.0273
2.87***
λ₃

tau persistence

Long-term factor persistence

0.9701
92.64***

Persistence:

0.962

Half-life:

18 days