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	param	t-stat
$ω$	0.1163	8.19
$α$	0.1667	16.96
$β$	0.8333	63.65
$γ$	-0.1529	-1.97
$δ$	0.5000	8.11

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Stealth Biotherapeutics Inc APARCH Volatility Analysis

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Parameter Estimates

News Impact Curve

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