In this article, we take a more granular look at representativeness through trading volumes of Euribor Panel banks within tenor buckets, particularly in the context of the addition of KBC Bank as a new Euribor Panel member. In our previous analysis (20 May 2026) we focused on broader market representativeness and the impact of Barclay's departure from the panel. We analyse EUR‑denominated, unsecured money market instruments issued in the 12 month period to 31 May 2026, focusing on Euribor panel banks versus the broader universe of European credit institutions. The data for the European market is sourced from CMDportal's ISIN-by-ISIN database and our analysis leverages both this and EMMI's well-documented Euribor rate methodology. See the 'Where is this data coming from?' section below to understand the exact filters we used in this post.
Quick Take:
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Front-End Rise in Representativeness: The addition of KBC Bank to the Euribor panel significantly improves short-term benchmark validity, boosting panel market share in the 1-week (+4.4 ppt) and 3-month (+8.0 ppt) buckets. This successfully replaces front-end volume following the departure of Barclays Bank in February 2026.
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Decline in the Long-End: KBC’s front-end funding leaves a critical coverage gap at the 6-month and 12-month tenors, reducing panel market share by –4.3 ppt and –5.1 ppt compared to the Barclays counterfactual.
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Long-End Vulnerabilities: This erosion of market share in the long-end undermines Euribor's structural robustness. Longer tenors rely heavily on security-based transactions to anchor rates and a thin panel increases distortion risks across these benchmark buckets.
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