Prices on shares in selected power companies and in companies with largetrading activity in electricity:August 17Company Closing price Change in % VolumeSTOCKHOLM (SEK)Holmen 302,00 -4,58 706Stora Enso 105,50 0,48 6 402COPENHAGEN (DKK)Nesa 9800,00 - 29/5Vestas Wind Systems 171,25 2,24 1 820 049HELSINKI (EUR)Fortum 21,07 -2,90 5 525 171Stora Enso 11,33 -2,83 5 400OSLO (NOK)Arendals Fossekompani 1300,00 0,08 70Hafslund 115,50 0,44...