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	param	t-stat
$ω$	0.0316	34.12
$α$	0.0761	33.86
$β$	0.9129	474.75
$γ$	0.8931	28.44
$δ$	1.1045	43.55

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State Street SPDR S&P MidCap 400 ETF Trust APARCH Volatility Analysis

Volatility Prediction for Friday, February 13th, 2026:14.94% (+2.83%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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