Prices on shares in selected power companies and in companies with largetrading activity in electricity:January 18COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 44,80 0,67 12 749Eolus Vind 42,50 0,00 7 440Holmen 244,60 2,34 2 602Stora Enso 78,00 1,43 26 285COPENHAGEN (DKK)Vestas Wind Systems 191,00 3,52 1 840 689HELSINKI (EUR)Fortum 22,59 0,49 1 396 873Stora Enso 8,93 3,36 24 603OSLO...