Prices on shares in selected power companies and in companies with largetrading activity in electricity:February 23STOCKHOLM (SEK)Arise Windpower 41,80 -3,91 21 467Eolus Vind 51,00 0,00 22 550Holmen 225,90 -2,21 876Stora Enso 75,30 -1,38 14 425COPENHAGEN (DKK)Vestas Wind Systems 172,10 -2,44 849 573HELSINKI (EUR)Fortum 21,92 -0,50 2 265 559Stora Enso 8,51 -1,96 16 831OSLO (NOK)Arendals Fossekompani 1650,00 -1,79 10Hafslund 69,00 -0,36...