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	param	t-stat
$ω$	0.0264	20.31
$α$	0.0421	19.80
$β$	0.9356	554.92
$γ$	0.0242	5.92

V-Lab

AT&T Inc GJR-GARCH Volatility Analysis

Volatility Prediction for Wednesday, February 18th, 2026:25.67% (-0.74%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other AT&T Inc Analyses