Prices on shares in selected power companies and in companies with largetrading activity in electricity:May 5Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 44,70 -4,69 83 740Eolus Vind 41,70 -1,88 53 632Holmen 185,00 0,00 0Stora Enso 55,25 -6,75 14 772COPENHAGEN (DKK)Vestas Wind Systems 313,30 -3,39 2 297 131HELSINKI (EUR)Fortum 18,71 -1,27 4 589 281Stora Enso 5,85 -4,26 10 148OSLO...