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	param	t-stat
$ω$	0.0159	10.50
$α$	0.0390	16.57
$β$	0.9577	358.95

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Costco Wholesale Corp GARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:23.28% (+0.41%)

Date Range:

Parameter Estimates

News Impact Curve

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