Prices on shares in selected power companies and in companies with largetrading activity in electricity:February 17STOCKHOLM (SEK)Arise Windpower 44,80 0,00 11 572Eolus Vind 51,25 0,00 29 844Holmen 230,00 -1,20 13Stora Enso 78,85 -1,44 5 638COPENHAGEN (DKK)Vestas Wind Systems 168,90 -1,97 1 347 647HELSINKI (EUR)Fortum 21,86 -1,18 1 737 799Stora Enso 8,97 -2,50 5 884OSLO (NOK)Arendals Fossekompani 1680,00 0,00 55Hafslund 69,50...