Risks and efficiency gains of a tiered structure in large-value payments: a simulation approach
The large-value payment system in the United Kingdom (CHAPS) is highly tiered: a few settlement banks make payments on behalf of many customer banks. This paper makes use of a simulation approach to quantify by how much tiering affects, on the one hand, concentration and credit risk and, on the other, the liquidity needs of CHAPS. We do so by creating scenarios where current settlement banks become customer banks and thus we increase the degree of tiering. The results show that concentration risk would rise substantially in what is already a highly concentrated system. As for credit risk, the size of intraday exposures compared with settlement banks' capital is very small and therefore the likelihood of contagion remote. More importantly, the increase in credit risk brought to the system by settlement banks leaving CHAPS bears little relationship to the values settled by each individual bank. We find that increasing the degree of tiering in CHAPS leads to substantial liquidity savings - although the liquidity saved is only a fraction of the spare liquidity currently posted in the system. Most of the savings are due to liquidity pooling rather than to internalisation of payments. There is a strong relationship between changes in values settled and liquidity needs. This relationship can be used to forecast the impact on liquidity needs if more banks were to join CHAPS. The quantification of the trade-off between risk and efficiency in different scenarios provides policymakers with a useful analytical framework for analysing the effects of tiering.
|Date of creation:||Jan 2008|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: +44 (0)171 601 4030
Fax: +44 (0)171 601 5196
Web page: http://www.bankofengland.co.uk/
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Selgin, George, 2004. "Wholesale payments: questioning the market-failure hypothesis," International Review of Law and Economics, Elsevier, vol. 24(3), pages 333-350, September.
- Mark J. Flannery, 1996.
"Financial crises, payment system problems, and discount window lending,"
Board of Governors of the Federal Reserve System (U.S.), pages 804-831.
- Flannery, Mark J, 1996. "Financial Crises, Payment System Problems, and Discount Window Lending," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 28(4), pages 804-24, November.
- Charles M. Kahn & William Roberds, 2009. "Payments Settlement: Tiering in Private and Public Systems," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 41(5), pages 855-884, 08.
When requesting a correction, please mention this item's handle: RePEc:boe:boeewp:337. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Publications Team)
If references are entirely missing, you can add them using this form.