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	param	t-stat
$ω$	0.2558	6.32
$α$	0.0813	13.90
$β$	0.8720	75.73
$γ$	0.2639	4.71
$δ$	0.8539	9.03

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Prothena Corp PLC APARCH Volatility Analysis

Volatility Prediction for Tuesday, February 17th, 2026:59.92% (-1.74%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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