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	param	t-stat
$ω$	1.3185	6.69
$α$	0.0807	10.09
$β$	0.8929	85.40
$γ_{1}$	0.0224	0.75
$γ_{2}$	0.0111	0.22
$γ_{3}$	-0.1243	-3.00
$γ_{4}$	0.1979	5.07
$γ_{5}$	-0.1836	-3.97
$γ_{6}$	0.1183	2.11
$γ_{7}$	-0.0415	-0.94
$γ_{8}$	-0.0118	-0.50

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Thursday, February 26th, 2026:40.69% (-0.77%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses