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	param	t-stat
$ω$	0.0907	8.10
$α$	0.0718	21.12
$β$	0.9272	311.67
$γ$	0.3627	10.61
$δ$	1.5961	24.14

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Alpha Natural Resources Inc APARCH Volatility Analysis

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Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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