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	param	t-stat
$ω$	0.0151	17.15
$α$	0.0495	23.14
$β$	0.9407	571.52
$γ$	0.0110	2.72

V-Lab

Graham Holdings Co GJR-GARCH Volatility Analysis

Volatility Prediction for Friday, February 20th, 2026:28.01% (-0.77%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other Graham Holdings Co Analyses