The article sets out to ventilate from the standpoint of scientific bank management theory the controversial delimitation of the “money market” in the literature and in practice with special reference to institutional conditions in the Federal Republic of Germany. [The article first appeared in 1976 in the tribute to Prof. Dr. Dr. h.c. Wilhelm Hasenack, Göttingen, for his 75th birthday (Unternehmen und Gesellschaft {The Firm and Society}, nwb-Verlag Herne/Berlin 1976, pp. 163 - 187)]. The author classifies the money market concepts presented in the literature into three versions: 1. Narrow formulation (purpose of money market transactions: “Offsetting of temporary liquidity differences among banks by redistribution of available holdings of ...