Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 19Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 52,75 -0,47 26 942Eolus Vind 42,00 -1,87 18 510Holmen 198,00 -2,70 10Stora Enso 58,25 -2,10 9 705COPENHAGEN (DKK)Vestas Wind Systems 330,00 -2,08 1 129 775HELSINKI (EUR)Fortum 18,54 -0,70 1 767 481Stora Enso 5,91 -3,59 10 638OSLO...