Banking Activity Model in the Islamic Finance Doctrine

significant limitations to the possibility of effective functioning of this concept in practice -in a competitive financial market of an open market economy.The general conclusion of the study is that despite a significant number of developed and standardised organisational and legal forms and models of banking activities in the Islamic finance doctrine, there are still significant contradictions and unresolved problems with regard to key economic categories, such as, for example, the definition of "margin", the use of interbank financing instruments, and effective management of bank liquidity.Moreover, in our opinion, the resolution of some contradictions within the interest-free banking paradigm is a difficult task for Islamic lawyers, economists and financiers.