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	param	t-stat
$ω$	0.0343	37.34
$α$	0.0940	33.70
$β$	0.9001	340.67
$γ$	0.9641	24.55
$δ$	0.9398	38.64

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

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News Impact Curve

Volatility Forecast

Parameter Estimates

Other State Street SPDR S&P 500 ETF Trust Analyses