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	param	t-stat
$ω$	-0.0133	-1.16
$α$	0.1067	12.24
$β$	0.8584	90.76
$γ$	0.7439	7.70

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

Volatility Prediction for Tuesday, February 17th, 2026:16.54% (-1.00%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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