Prices on shares in selected power companies and in companies with largetrading activity in electricity:December 23COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 44,00 0,23 28 818Eolus Vind 42,70 -1,84 10 600Holmen 222,10 -1,29 1 436Stora Enso 69,10 -1,00 28 741COPENHAGEN (DKK)Vestas Wind Systems 177,70 -0,56 514 591HELSINKI (EUR)Fortum 22,38 0,22 762 944Stora Enso 7,74 -0,07 6 415OSLO (NOK)Arendals Fossekompani...