Investors in the salmon farming sector remain shaken by the announcement of the Norwegian government's proposed "resource tax," and there are signs that the market fears other regions may face similar actions.

Following the announcement on Sept.28 that Norway is considering a new 40% tax on its salmon farming companies, Norwegian salmon producers saw around $5.6 billion (€5.8 billion) wiped off their cumulative market value.

However, other shares were shaken in the aftermath as well, including Oslo-listed Bakkafrost, despite not having operations in Norway.