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	param	t-stat
$ω$	1.3125	6.70
$α$	0.0809	10.05
$β$	0.8923	84.37
$γ_{1}$	0.0209	0.70
$γ_{2}$	0.0146	0.29
$γ_{3}$	-0.1286	-3.12
$γ_{4}$	0.2022	5.22
$γ_{5}$	-0.1873	-4.05
$γ_{6}$	0.1201	2.17
$γ_{7}$	-0.0407	-0.94
$γ_{8}$	-0.0132	-0.57

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Friday, January 9th, 2026:24.71% (+0.05%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses