Prices on shares in selected power companies and in companies with largetrading activity in electricity:May 7Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 47,60 4,85 115 270Eolus Vind 41,10 3,79 26 292Holmen 185,00 1,09 70Stora Enso 57,00 5,07 31 208COPENHAGEN (DKK)Vestas Wind Systems 312,10 6,77 1 885 902HELSINKI (EUR)Fortum 18,74 4,87 4 097 818Stora Enso 5,89 4,62 22 340OSLO...