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	param	t-stat
$ω$	1.2988	6.60
$α$	0.0808	10.09
$β$	0.8928	85.31
$γ_{1}$	0.0202	0.67
$γ_{2}$	0.0144	0.29
$γ_{3}$	-0.1266	-3.07
$γ_{4}$	0.1999	5.15
$γ_{5}$	-0.1844	-3.99
$γ_{6}$	0.1183	2.11
$γ_{7}$	-0.0411	-0.92
$γ_{8}$	-0.0122	-0.52

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:29.83% (-0.17%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses