Prices on shares in selected power companies and in companies with largetrading activity in electricity:March 11STOCKHOLM (SEK)Arise Windpower 40,50 -2,41 7 515Eolus Vind 50,75 -1,93 16 309Holmen 233,70 0,30 350Stora Enso 71,85 -0,90 14 877COPENHAGEN (DKK)Vestas Wind Systems 179,00 -0,78 672 649HELSINKI (EUR)Fortum 22,01 -2,57 1 761 023Stora Enso 8,16 -0,55 7 123OSLO (NOK)Arendals Fossekompani 1720,00 -6,52 28Hafslund 68,25 -1,80...