Prices on shares in selected power companies and in companies with largetrading activity in electricity:May 3Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 47,40 -0,84 47 567Eolus Vind 42,80 -1,61 23 175Holmen 186,50 -3,87 413Stora Enso 60,75 1,25 39 329COPENHAGEN (DKK)Vestas Wind Systems 343,90 0,50 996 163HELSINKI (EUR)Fortum 19,33 -0,77 1 635 087Stora Enso 6,33 0,64 15 640OSLO (NOK)Arendals...