Prices on shares in selected power companies and in companies with largetrading activity in electricity:October 18COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 41,50 -3,49 11 420Eolus Vind 43,90 0,92 16 400Holmen 214,00 -0,05 430Stora Enso 67,30 -2,75 2 843COPENHAGEN (DKK)Vestas Wind Systems 207,40 1,32 827 495HELSINKI (EUR)Fortum 20,08 -0,15 1 534 325Stora Enso 7,23 -2,69 5 597OSLO (NOK)Arendals Fossekompani...