The performance of SalMar's stock is outpacing that of all other conventional salmon farmers so far this year as producers experience mixed fortunes on both the Oslo and Santiago stock markets.

Shares in Norway's SalMar rose more than 22 percent to NOK469.7 (€41.76/$45.69) during the year through Aug. 1, reaching a year-to-date high of NOK 518 (€46.06/$50.39) on May 25, the day Norway's government finally reached agreement on a new salmon tax to be imposed on the Scandinavian nation's producers.