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	param	t-stat
$ω$	1.3137	6.70
$α$	0.0808	10.06
$β$	0.8925	84.63
$γ_{1}$	0.0214	0.71
$γ_{2}$	0.0136	0.27
$γ_{3}$	-0.1275	-3.09
$γ_{4}$	0.2010	5.18
$γ_{5}$	-0.1861	-4.03
$γ_{6}$	0.1193	2.15
$γ_{7}$	-0.0401	-0.92
$γ_{8}$	-0.0138	-0.60

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Tuesday, January 20th, 2026:29.19% (+0.58%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses