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	param	t-stat
$m$	21
$α$	0.1249	26.76
$β$	0.6733	43.15
$γ$	0.0073	0.99
$λ_{1}$	0.0090	1.94
$λ_{2}$	0.0339	4.40
$λ_{3}$	0.9626	105.54

V-Lab

Graham Holdings Co MF2-GARCH Volatility Analysis

Volatility Prediction for Monday, February 23rd, 2026:25.93% (-0.44%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other Graham Holdings Co Analyses