Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 29Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 48,00 1,05 16 183Eolus Vind 43,80 4,29 79 700Holmen 196,00 8,89 310Stora Enso 60,50 1,26 4 207COPENHAGEN (DKK)Vestas Wind Systems 342,20 2,15 2 093 063HELSINKI (EUR)Fortum 18,71 -0,16 2 330 622Stora Enso 6,26 1,13 3 691OSLO...