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	param	t-stat
$ω$	0.8156	6.13
$α$	0.2358	3.46
$β$	0.5663	5.63
$γ_{1}$	0.1546	2.28
$γ_{2}$	-0.2419	-2.80

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Hokkaido Electric Power Co Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Monday, February 9th, 2026:51.62% (+3.54%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

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