Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 27Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 47,10 -4,85 120 289Eolus Vind 43,00 2,38 424 066Holmen 190,00 -2,06 521Stora Enso 62,50 0,40 23 892COPENHAGEN (DKK)Vestas Wind Systems 351,00 -2,53 2 930 837HELSINKI (EUR)Fortum 18,91 -2,93 3 540 953Stora Enso 6,38 0,00 17 992OSLO...