Prices on shares in selected power companies and in companies with largetrading activity in electricity:October 21COMPANY Latest close Change % VolumeSTOCKHOLM (SEK)Arise Windpower 42,10 0,72 2 486Eolus Vind 45,00 3,93 74 063Holmen 210,20 0,33 2 576Stora Enso 68,05 0,96 3 593COPENHAGEN (DKK)Vestas Wind Systems 201,60 1,77 1 816 249HELSINKI (EUR)Fortum 20,23 2,59 2 199 425Stora Enso 7,35 1,24 2 650OSLO...