Prices on shares in selected power companies and in companies with largetrading activity in electricity:February 18STOCKHOLM (SEK)Arise Windpower 45,30 1,12 11 063Eolus Vind 51,75 0,98 30 729Holmen 234,00 1,74 145Stora Enso 78,60 -0,32 3 107COPENHAGEN (DKK)Vestas Wind Systems 168,60 -0,18 1 351 532HELSINKI (EUR)Fortum 21,98 0,55 1 263 017Stora Enso 9,01 0,45 1 400OSLO (NOK)Arendals Fossekompani 1680,00 0,00 0Hafslund 69,50...