Prices on shares in selected power companies and in companies with largetrading activity in electricity:August 19Company Closing price Change in % VolumeSTOCKHOLM (SEK)Arise Windpower 45,00 -1,75 2 781Eolus Vind 41,70 0,24 89 273Holmen 196,80 0,00 0Stora Enso 63,65 2,00 5 664COPENHAGEN (DKK)Vestas Wind Systems 243,30 0,54 5 432 579HELSINKI (EUR)Fortum 18,40 -1,39 1 188 481Stora Enso 6,80 2,26 3 520OSLO...