Prices on shares in selected power companies and in companies with largetrading activity in electricity:July 21Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 43,80 0,69 1 935Eolus Vind 41,80 0,48 12 814Holmen 192,00 0,00 0Stora Enso 59,30 0,42 9 830COPENHAGEN (DKK)Vestas Wind Systems 279,80 0,40 682 166HELSINKI (EUR)Fortum 18,07 -0,44 1 620 637Stora Enso 6,25 -1,11 11 844OSLO (NOK)Arendals...