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	param	t-stat
$ω$	0.0268	35.56
$α$	0.0856	44.72
$β$	0.9098	488.59
$γ$	0.6954	37.10
$δ$	1.0299	40.78

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S&P MidCap 400 Index APARCH Volatility Analysis

Volatility Prediction for Tuesday, December 30th, 2025:13.04% (+0.72%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other S&P MidCap 400 Index Analyses