Prices on shares in selected power companies and in companies with largetrading activity in electricity:January 21COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 44,50 1,14 1 671Eolus Vind 44,60 2,06 17 306Holmen 238,00 1,93 1 936Stora Enso 83,75 5,75 32 526COPENHAGEN (DKK)Vestas Wind Systems 191,50 5,22 2 396 031HELSINKI (EUR)Fortum 22,52 0,72 1 972 542Stora Enso 9,19 4,43 11 529OSLO...