Prices on shares in selected power companies and in companies with largetrading activity in electricity:January 31COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 44,10 -0,90 2 740Eolus Vind 50,25 0,00 176 284Holmen 245,00 -0,81 2 020Stora Enso 82,45 -2,48 20 526COPENHAGEN (DKK)Vestas Wind Systems 187,70 1,73 637 112HELSINKI (EUR)Fortum 22,50 1,12 1 839 266Stora Enso 9,30 -2,62 17 738OSLO (NOK)Arendals...