Counterparty Credit Limits: The Impact of a Risk-Mitigation Measure on Everyday Trading

Martin D. Gould, Nikolaus Hautsch, Sam D. Howison and Mason A. Porter

Applied Mathematical Finance, 2020, vol. 27, issue 6, 520-548

Abstract: A counterparty credit limit (CCL) is a limit that is imposed by a financial institution to cap its maximum possible exposure to a specified counterparty. CCLs help institutions to mitigate counterparty credit risk via selective diversification of their exposures. In this paper, we analyse how CCLs impact the prices that institutions pay for their trades during everyday trading. We study a high-quality data set from a large electronic trading platform in the foreign exchange spot market that allows institutions to apply CCLs. We find empirically that CCLs had little impact on the vast majority of trades in this data set. We also study the impact of CCLs using a new model of trading. By simulating our model with different underlying CCL networks, we highlight that CCLs can have a major impact in some situations.

Date: 2020
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Working Paper: Counterparty Credit Limits: The Impact of a Risk-Mitigation Measure on Everyday Trading (2021)
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DOI: 10.1080/1350486X.2021.1893770

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