Prices on shares in selected power companies and in companies with largetrading activity in electricity:December 12Company Closing price Change in % VolumeSTOCKHOLM (SEK)Holmen 284,00 4,41 375Stora Enso 101,75 -3,78 32 976COPENHAGEN (DKK)Vestas Wind Systems 518,00 0,58 1 213 312HELSINKI (EUR)Fortum 29,22 -0,68 1 782 224Stora Enso 10,85 -1,09 70 492OSLO (NOK)Arendals Fossekompani 1990,00 - 10/12Hafslund 154,00 0,00 8 500Norsk Hydro...