Prices on shares in selected power companies and in companies with largetrading activity in electricity:March 7STOCKHOLM (SEK)Arise Windpower 41,50 -2,35 29 060Eolus Vind 52,00 -0,95 54 281Holmen 237,90 2,50 817Stora Enso 75,90 2,22 11 644COPENHAGEN (DKK)Vestas Wind Systems 180,00 -0,28 444 375HELSINKI (EUR)Fortum 22,24 0,54 1 628 784Stora Enso 8,42 0,24 7 811OSLO (NOK)Arendals Fossekompani 1785,00 8,18 52Hafslund 71,00 2,16...