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	param	t-stat
$ω$	0.0196	20.53
$α$	0.0502	0.02
$β$	0.9200	329.17
$γ$	1.0000	0.02
$δ$	1.5900	20.06

V-Lab

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

Volatility Prediction for Thursday, February 12th, 2026:19.26% (-0.73%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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