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	param	t-stat
$ω$	1.1127	7.56
$α$	0.1189	7.22
$β$	0.7300	20.49
$γ_{1}$	-0.0293	-0.88
$γ_{2}$	0.0529	1.02
$γ_{3}$	-0.0632	-1.73
$γ_{4}$	0.0803	2.35
$γ_{5}$	-0.0777	-2.06
$γ_{6}$	0.0685	1.71
$γ_{7}$	-0.0470	-1.01
$γ_{8}$	0.0686	1.47
$γ_{9}$	-0.0984	-3.04

V-Lab

Powell Industries Inc Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:75.61% (-3.55%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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