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	param	t-stat
$ω$	0.0288	36.39
$α$	0.0857	32.06
$β$	0.9061	402.90
$γ$	0.8951	21.72
$δ$	1.0329	40.81

V-Lab

S&P 500 Index APARCH Volatility Analysis

Volatility Prediction for Monday, December 22nd, 2025:13.16% (-0.70%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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