2024-03-28T19:41:53Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00042700
2022-12-19T04:16:33Z
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9:7435:7439
Payment Instruments and Collateral in the Interbank Payment System
Tomura, Hajime
98196
bank reserves
large value payment system
interbank money market
clearing house
collateral
legal tender
This paper presents a three-period model to analyze the need for bank reserves in the presence of other liquid assets like Treasury securities. If a pair of banks settle bank transfers without bank reserves, they must prepare extra liquidity for interbank payments, because depositors'demand for timely payments causes a hold-up problem in the bilateral settlement of bank transfers. In light of this result, the interbank payment system provided by the central bank can be regarded as an implicit interbank settlement contract to save liquidity. The central bank is necessary for this contract as the custodian of collateral. Bank reserves can be characterized as the balances of liquid collateral submitted by banks to participate into this contract. This result explains the rate-of-return dominance puzzle and the need for substitution between bank reserves and other liquid assets simultaneously. The optimal contract is the floor system, not only because it pays interest on bank reserves, but also because it eliminates the over- the-counter interbank money market. The model indicates it is efficient if all banks share the same custodian of collateral, which justifies the current practice that a public institution provides the interbank payment system.
2012~2016年度科学研究費補助金[基盤研究(S)]「長期デフレの解明」(研究代表者 東京大学経済学研究科・渡辺努, 課題番号:24223003)
technical report
UTokyo Price Project
2016-09
application/pdf
JSPS Grants-in-Aid for Scientific Research (S) Understanding Persistent Deflation in Japan Working Paper Series
090
https://repository.dl.itc.u-tokyo.ac.jp/record/42700/files/wp090.pdf
eng
http://www.price.e.u-tokyo.ac.jp/researchdata/