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	param	t-stat
$ω$	0.9448	10.08
$α$	0.0960	5.07
$β$	0.6494	9.41
$γ_{1}$	-0.0628	-2.42
$γ_{2}$	0.0610	1.43
$γ_{3}$	-0.0050	-0.15
$γ_{4}$	0.0418	1.25
$γ_{5}$	-0.0887	-2.70
$γ_{6}$	0.1451	4.24
$γ_{7}$	-0.1522	-2.96
$γ_{8}$	0.0989	1.08

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ADTRAN Holdings Inc Spline-GARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:64.92% (-1.38%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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