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	param	t-stat
$ω$	1.3172	6.70
$α$	0.0808	10.08
$β$	0.8927	85.03
$γ_{1}$	0.0224	0.74
$γ_{2}$	0.0115	0.23
$γ_{3}$	-0.1255	-3.04
$γ_{4}$	0.1993	5.13
$γ_{5}$	-0.1846	-4.00
$γ_{6}$	0.1186	2.13
$γ_{7}$	-0.0412	-0.94
$γ_{8}$	-0.0121	-0.52

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Monday, February 9th, 2026:26.20% (-0.12%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses