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	param	t-stat
$ω$	1.0051	9.56
$α$	0.1127	8.34
$β$	0.8092	37.27
$γ_{1}$	0.0451	3.34
$γ_{2}$	-0.0763	-3.41
$γ_{3}$	0.0471	2.52
$γ_{4}$	-0.0377	-2.25
$γ_{5}$	0.0376	3.38

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Aetna Inc Zero Slope Spline-GARCH Volatility Analysis

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News Impact Curve

Volatility Forecast

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