Prices on shares in selected power companies and in companies with largetrading activity in electricity:July 30Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 47,50 3,26 26 992Eolus Vind 41,50 1,22 12 487Holmen 193,00 0,00 0Stora Enso 62,60 -2,19 4 820COPENHAGEN (DKK)Vestas Wind Systems 278,00 -3,07 1 736 167HELSINKI (EUR)Fortum 17,85 -1,54 1 922 552Stora Enso 6,82 0,44 2 296OSLO...