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	param	t-stat
$ω$	0.9374	7.51
$α$	0.0722	8.96
$β$	0.8832	68.35
$γ_{1}$	0.0317	1.37
$γ_{2}$	-0.0122	-0.35
$γ_{3}$	-0.1018	-4.12
$γ_{4}$	0.1485	6.67
$γ_{5}$	-0.0962	-4.68
$γ_{6}$	0.0680	2.62
$γ_{7}$	-0.0531	-1.33
$γ_{8}$	-0.0135	-0.17

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AT&T Inc Spline-GARCH Volatility Analysis

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