{"title":"Hedging of Fixing Exposure","authors":"Johannes Muhle-Karbe, Roel Oomen, Benjamin Weber","doi":"10.1111/mafi.12464","DOIUrl":null,"url":null,"abstract":"<p>FX fixings are an indispensable and widely used reference rate in a market that trades continuously without an official close. Yet, a dealer's handling of fix transactions is a much debated topic. Especially when exposure to the fix is large relative to available market liquidity and hedging may extend to the pre-fix window, an inherent conflict of interest can arise between dealer and client. In this paper we use a model with permanent and transient market impact to characterize a dealer's optimal strategy to hedge fixing exposure. We show that smaller fix exposures are fully hedged over the calculation window, but that larger fix transactions are optimally hedged over a longer horizon that includes the pre-fix window. A client's all-in transaction costs can be lowered by pre-fix hedging provided that transient impact decays sufficiently quickly and dominates permanent impact.</p>","PeriodicalId":49867,"journal":{"name":"Mathematical Finance","volume":"35 4","pages":"818-840"},"PeriodicalIF":2.4000,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/mafi.12464","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematical Finance","FirstCategoryId":"96","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/mafi.12464","RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BUSINESS, FINANCE","Score":null,"Total":0}
引用次数: 0
Abstract
FX fixings are an indispensable and widely used reference rate in a market that trades continuously without an official close. Yet, a dealer's handling of fix transactions is a much debated topic. Especially when exposure to the fix is large relative to available market liquidity and hedging may extend to the pre-fix window, an inherent conflict of interest can arise between dealer and client. In this paper we use a model with permanent and transient market impact to characterize a dealer's optimal strategy to hedge fixing exposure. We show that smaller fix exposures are fully hedged over the calculation window, but that larger fix transactions are optimally hedged over a longer horizon that includes the pre-fix window. A client's all-in transaction costs can be lowered by pre-fix hedging provided that transient impact decays sufficiently quickly and dominates permanent impact.
期刊介绍：
Mathematical Finance seeks to publish original research articles focused on the development and application of novel mathematical and statistical methods for the analysis of financial problems.
The journal welcomes contributions on new statistical methods for the analysis of financial problems. Empirical results will be appropriate to the extent that they illustrate a statistical technique, validate a model or provide insight into a financial problem. Papers whose main contribution rests on empirical results derived with standard approaches will not be considered.
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