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	param	t-stat
$ω$	0.0269	35.72
$α$	0.0853	44.91
$β$	0.9100	490.85
$γ$	0.6998	37.43
$δ$	1.0239	40.78

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S&P MidCap 400 Index APARCH Volatility Analysis

Volatility Prediction for Thursday, February 19th, 2026:12.76% (-0.57%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other S&P MidCap 400 Index Analyses