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	param	t-stat
$ω$	0.0580	6.25
$α$	0.0607	13.75
$β$	0.9297	479.24
$γ$	0.5206	18.29
$δ$	1.4271	12.72

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Williams Cos Inc/The APARCH Volatility Analysis

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News Impact Curve

Volatility Forecast

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