Subject. The impact of blockchain technologies on the operating expenses of commercial banks. Objectives. To evaluate the effectiveness of the impact of blockchain technologies on the activities of commercial banks. Methods. The assessment of the impact of blockchain technologies on commercial banks was performed in the Google Colab programming environment by constructing a linear regression model using an independent dummy variable characterizing the implementation of the blockchain. The modeling was carried out on the basis of financial reporting data from systemically important Russian credit institutions. Results. The hypothesis of reducing the operating costs of commercial banks after the implementation of projects using blockchain is rejected. Conclusions. The results obtained indicate that blockchain technology has not yet reached the stage of maturity in the Russian financial market, and the expected reduction in operating costs does not occur in the long term. The revealed effect of blockchain implementation suggests that the time lag between investments in technology and significant cost reduction exceeds eight years. The results of the study can be used by commercial banks to assess the feasibility of implementing a blockchain, taking into account the long-term payback horizon.
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