Finnish fish markets have traditionally been supplied by domestic wild fish species: Baltic herring, salmon and several freshwater species. Nowadays, farmed salmon and rainbow trout dominate the market and wild-caught species are moving to niche product segment. In this paper we examine the market integration of Finnish fish markets. We apply multivariate vector autoregressive (VAR) model to study interactions between farmed rainbow trout and wild caught European whitefish, pikeperch, perch and salmon. We found two cointegrated relations in the system. Firstly, European whitefish, pikeperch, and perch are close substitutes to each other. Secondly, we observed co-integration between wild-caught species and farmed rainbow trout. We also model...