Prices on shares in selected power companies and in companies with largetrading activity in electricity:March 4STOCKHOLM (SEK)Arise Windpower 42,50 -3,41 211 863Eolus Vind 52,50 0,96 21 424Holmen 232,10 -0,22 3Stora Enso 74,25 -2,05 10 935COPENHAGEN (DKK)Vestas Wind Systems 180,50 0,33 476 135HELSINKI (EUR)Fortum 22,12 0,09 1 363 852Stora Enso 8,40 -2,61 3 889OSLO (NOK)Arendals Fossekompani 1650,00 0,00 0Hafslund 69,50 -0,71...