Prices on shares in selected power companies and in companies with largetrading activity in electricity:May 27Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 49,70 5,30 38 464Eolus Vind 41,80 -0,48 4 524Holmen 188,00 0,80 198Stora Enso 58,50 2,63 14 174COPENHAGEN (DKK)Vestas Wind Systems 289,00 -0,76 1 141 028HELSINKI (EUR)Fortum 18,24 3,40 1 973 703Stora Enso 5,99 0,17 2 237OSLO...