Subject. This article deals with the issues related to the systemic risk of banking ecosystems and its impact on financial stability. Objectives. The article aims to define the risk of banking ecosystems and identify areas to improve the regulation of banking ecosystems within the framework of ensuring financial stability. Methods. For the study, we used the methods of comparative, logical and conceptual analyses, expert assessment, and heuristic modeling. Results. The article defines the systemic risk of banking ecosystems as a systemic risk of loss of financial stability, the main sources of loss of which are credit institutions using the ecosystem model of banking. It identifies specific sources and reveals the main stages of the spread of systemic risk in banking ecosystems. The article also presents the author-developed proposals for improving regulation in terms of establishing criteria for attributing banking ecosystems to systemically important credit organizations. Conclusions and Relevance. The importance to manage the systemic risk of banking ecosystems is growing in the context of the spread of the ecosystem model of banking. The implementation of the author-developed proposals for improving regulation will contribute to the sustainable functioning of the financial system in terms of providing liquidity and forming prices for financial assets. The results of the study can serve as a theoretical basis for the development of measures by central banks in the field of ensuring financial stability, as well as be used by credit institutions that implement an ecosystem model of banking.
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