Prices on shares in selected power companies and in companies with largetrading activity in electricity:December 22COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 43,90 2,09 21 466Eolus Vind 43,50 3,57 66 257Holmen 225,00 0,31 620Stora Enso 69,80 2,12 24 578COPENHAGEN (DKK)Vestas Wind Systems 178,70 -1,00 947 892HELSINKI (EUR)Fortum 22,33 0,36 949 046Stora Enso 7,75 1,64 10 524OSLO (NOK)Arendals Fossekompani 1690,00...