Prices on shares in selected power companies and in companies with largetrading activity in electricity:April 28Company Closing price Change in % VolumeSTOCKHOLM (SEK)Holmen 218,50 -0,68 297Stora Enso 76,25 -0,33 3 442COPENHAGEN (DKK)Vestas Wind Systems 530,00 0,19 499 028HELSINKI (EUR)Fortum 27,81 -2,73 2 658 340Stora Enso 8,26 0,24 3 661OSLO (NOK)Arendals Fossekompani 1990,00 - 24/4Hafslund 109,00 -0,46 10 500Norsk Hydro 79,50...