Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 15Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 53,00 -0,47 84 830Eolus Vind 42,10 -1,87 9 785Holmen 204,50 3,28 247Stora Enso 61,00 -0,81 4 757COPENHAGEN (DKK)Vestas Wind Systems 333,50 0,45 1 182 395HELSINKI (EUR)Fortum 18,97 -0,42 2 609 915Stora Enso 6,17 0,00 7 342OSLO...