In the midst of a third-quarter earnings bloodbath brought on by oversupply, low prices and production problems, Norway's top stock-listed farmed salmon shares are down by between 20 percent and 30 percent on the Oslo Stock Exchange from Aug. 20 through Nov. 15.

Cermaq reported a steep drop in profit in early November, hurt most by the impact from disease problems in Chile. Shares of the Norway-based salmon and fish feed producer are down over 21 percent the past three months, closing Thursday at NOK 75.75