Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 26Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 49,50 -2,94 127 921Eolus Vind 42,00 0,72 7 660Holmen 194,00 -0,26 340Stora Enso 62,25 2,05 16 997COPENHAGEN (DKK)Vestas Wind Systems 360,10 5,63 6 033 115HELSINKI (EUR)Fortum 19,48 2,91 4 010 135Stora Enso 6,38 2,24 18 682OSLO...