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	param	t-stat
$ω$	0.9176	7.46
$α$	0.0729	8.77
$β$	0.8795	65.41
$γ_{1}$	0.0270	1.15
$γ_{2}$	-0.0034	-0.10
$γ_{3}$	-0.1084	-4.40
$γ_{4}$	0.1521	6.97
$γ_{5}$	-0.1018	-5.00
$γ_{6}$	0.0797	3.19
$γ_{7}$	-0.0690	-2.39
$γ_{8}$	0.0215	0.90

V-Lab

AT&T Inc Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Wednesday, December 24th, 2025:20.46% (-0.16%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other AT&T Inc Analyses