Prices on shares in selected power companies and in companies with largetrading activity in electricity:May 11Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 46,00 -3,36 15 599Eolus Vind 41,60 1,22 22 525Holmen 186,00 0,54 1 300Stora Enso 55,00 -3,51 25 815COPENHAGEN (DKK)Vestas Wind Systems 303,30 -2,82 1 464 085HELSINKI (EUR)Fortum 18,74 0,00 2 579 256Stora Enso 5,67 -3,74 8...