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	param	t-stat
$ω$	0.0269	35.67
$α$	0.0853	44.90
$β$	0.9101	491.16
$γ$	0.7006	37.45
$δ$	1.0233	40.78

V-Lab

S&P MidCap 400 Index APARCH Volatility Analysis

Volatility Prediction for Monday, February 23rd, 2026:11.65% (-0.40%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other S&P MidCap 400 Index Analyses