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	param	t-stat
$ω$	0.0348	20.85
$α$	0.0863	39.49
$β$	0.9137	386.98
$γ$	0.2305	12.60
$δ$	1.0423	26.35

V-Lab

Pfizer Inc APARCH Volatility Analysis

Volatility Prediction for Friday, February 20th, 2026:25.81% (+1.61%)

Date Range:

Parameter Estimates

News Impact Curve

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