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	param	t-stat
$ω$	0.0295	28.13
$α$	0.0704	25.41
$β$	0.9204	427.49
$γ$	0.9382	22.24
$δ$	1.0699	32.67

V-Lab

State Street SPDR Portfolio S&P 400 Mid Cap ETF APARCH Volatility Analysis

Volatility Prediction for Thursday, February 12th, 2026:12.42% (+0.05%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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