Prices on shares in selected power companies and in companies with largetrading activity in electricity:September 17COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 44,00 0,69 4 854Eolus Vind 39,80 0,00 5 800Holmen 210,20 0,33 890Stora Enso 65,00 0,15 3 530COPENHAGEN (DKK)Vestas Wind Systems 217,00 -1,59 1 023 720HELSINKI (EUR)Fortum 19,22 0,10 2 029 663Stora Enso 7,06 -1,12 2 463OSLO (NOK)Arendals...