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	param	t-stat
$ω$	3.3700	17.36
$α$	0.2029	6.34
$β$	0.3835	14.03
$γ$	-0.1004	-2.49

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Amphastar Pharmaceuticals Inc GJR-GARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:45.90% (+4.11%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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