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	param	t-stat
$ω$	1.3212	6.67
$α$	0.0812	10.13
$β$	0.8925	85.22
$γ_{1}$	0.0229	0.76
$γ_{2}$	0.0099	0.20
$γ_{3}$	-0.1229	-2.96
$γ_{4}$	0.1963	5.01
$γ_{5}$	-0.1817	-3.91
$γ_{6}$	0.1161	2.06
$γ_{7}$	-0.0384	-0.86
$γ_{8}$	-0.0150	-0.63

V-Lab

American Express Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Friday, March 13th, 2026:37.90% (-1.17%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other American Express Co Analyses