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	param	t-stat
$ω$	0.9206	7.48
$α$	0.0734	8.82
$β$	0.8794	65.74
$γ_{1}$	0.0256	1.09
$γ_{2}$	-0.0012	-0.04
$γ_{3}$	-0.1095	-4.44
$γ_{4}$	0.1526	6.97
$γ_{5}$	-0.1019	-5.02
$γ_{6}$	0.0800	3.23
$γ_{7}$	-0.0706	-2.48
$γ_{8}$	0.0237	1.01

V-Lab

AT&T Inc Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Tuesday, January 20th, 2026:21.64% (-0.05%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other AT&T Inc Analyses