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JOURNALS // Izvestiya Vuzov. Severo-Kavkazskii Region. Natural Science // Archive

Izvestiya Vuzov. Severo-Kavkazskii Region. Natural Science, 2024, Issue 1, Pages 17–21 (Mi sfedu111)

PHYSICAL AND MATHEMATICAL SCIENCES

Formation of an optimal loan portfolio using a fuzzy-multiple approach

I. Zemlyakova

Institute of Mathematics, Mechanics and Computer Sciences, Southern Federal University, Rostov-on-Don

Abstract: The problem of profit maximization from lending to a financial organization is considered. A set of loan contracts forms a loan portfolio, which makes it possible to use the portfolio theory in the study of the designated problem. We will consider the formation of a loan portfolio as the formation of an investment portfolio. The problem arises of redistributing the funds of the investment portfolio in order to minimize its possible risk and maximize profitability. This problem in classical formulation can be solved according to Markowitz risk diversification. Thus, the problem of risk minimization and profitability maximization from lending to a financial institution can be represented as a fuzzy mathematical programming problem, and more specifically, as a fuzzy linear programming problem. The resulting problem is solved by considering discrete α-levels and is reduced to a set of linear programming problems constructed for each of them. A clear expected optimal solution can be obtained by applying the defuzzification method, which allows you to convert a fuzzy set into a crisp number.

UDC: 519.2

Received: 26.07.2023
Accepted: 19.02.2024

DOI: 10.18522/1026-2237-2024-1-17-21



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© Steklov Math. Inst. of RAS, 2026