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	param	t-stat
$ω$	0.0352	28.81
$α$	0.0826	3.53
$β$	0.8997	194.99
$γ$	1.0000	2.22
$δ$	1.1317	24.11

V-Lab

State Street SPDR Portfolio S&P 500 ETF APARCH Volatility Analysis

Volatility Prediction for Friday, February 13th, 2026:16.90% (+3.56%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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