For decades, loan institutions have been tying mortgage loan contracts with insurance contracts produced by their own insurance subsidiaries. The distribution of these insurances in the retail banking market has been massive, contributing to the exponential growth of the bancassurance channel and the use of banking networks. This paper examines, from our system of free competition, the conditions of competition arising through the tying practice and its repercussions in relation to the rest of the insurance sector operators.Las entidades de crédito llevan décadas anudando contratos de préstamo hipotecario con contratos de seguro producidos por sus propias filiales aseguradoras. La distribución de estos seguros en el mercado de banca minoris...