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	param	t-stat
$ω$	0.0288	36.50
$α$	0.0857	32.48
$β$	0.9063	403.17
$γ$	0.8986	22.03
$δ$	1.0238	40.72

V-Lab

S&P 500 Index APARCH Volatility Analysis

Volatility Prediction for Monday, February 23rd, 2026:12.79% (-0.70%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other S&P 500 Index Analyses