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	param	t-stat
$ω$	0.9999	7.51
$α$	0.0803	17.12
$β$	0.8357	81.90
$γ$	-1.0000	-34.90
$δ$	0.8754	17.30

V-Lab

CBOE S&P 500 9-Day Volatility Index APARCH Volatility Analysis

Volatility Prediction for Friday, February 20th, 2026:216.39% (-3.48%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other CBOE S&P 500 9-Day Volatility Index Analyses