Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 22Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 52,00 -1,89 43 225Eolus Vind 42,00 -1,18 22 751Holmen 194,00 -2,02 20Stora Enso 60,50 3,42 33 295COPENHAGEN (DKK)Vestas Wind Systems 333,00 -2,32 1 209 147HELSINKI (EUR)Fortum 18,75 0,92 3 646 332Stora Enso 6,17 1,15 27 950OSLO...