International Journal of Business and Economics Research
Volume 9, Issue 2, April 2020, Pages: 83-93
Received: Feb. 21, 2020;
Accepted: Mar. 5, 2020;
Published: Mar. 10, 2020
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Vladimir Kulipanov, Department of Control and Applied Mathematics, Moscow Institute of Physics and Technology, Moscow, Russian Federation
The last two decades of the XX century marked the starting point for the central banks across the globe to move their payment and settlement systems into Real Time Gross Settlement (RTGS) mode. Despite the fact that RTGS systems can effectively eliminate the credit exposure between the paying bank and the receiving bank at the interbank level by means of fast final and irrevocable money transfer, there is another serious problem associated with these systems. RTGS systems turned out to be liquidity-demanding arrangements, as opposed to deferred net settlement systems. Thus, the efficiency of liquidity management arrangements is the precondition of smooth RTGS operation, especially in tough times when liquidity is a systemic shortage. If liquidity management is inefficient, the RTGS system may stop operating properly by terminating in the grid-lock state brining chaos to the national economy. In this research we suggest the practical approach to solve the problem of seeking the maximization of aggregate value of payment instructions under liquidity shortage, including the most severe scenarios. The classification of the RTGS queue statuses is suggested and discussed. Some complementary results are articulated, including: (a) the statement that the formal mathematical optimization problem lies in the NP class of the computational complexity (the class of problems solved in polynomial time by nondeterministic Turing machine); (b) the equivalence between MaxFlow-MinCost problem (from the network flow theory) and the dual linear problem of the linear program relaxation of the initial optimization problem; (c) the illustration that no optimization strategy, other than the suggested one, can deliver substantially better optimization results. Despite enormous efforts, there were no previous research results reasonably claiming the near optimality of liquidity optimization strategy in RTGS systems under severe liquidity shortages. The results of this research may help the central banks and other RTGS system operators to ensure the protection of their payment systems from future liquidity crises and bring the resilience of respective national economies to the next level of sustainability.
The Gridlock-Proof Functionality in Real Time Gross Settlement Systems, International Journal of Business and Economics Research.
Vol. 9, No. 2,
2020, pp. 83-93.
Copyright © 2020 Authors retain the copyright of this article.
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