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AI Summary of Article 280a Interest rate risk category add-on
This document outlines the methodology for calculating the interest rate risk category add-on as stipulated in Article 278. Institutions are required to determine the AddOnIR for a netting set by aggregating the individual add-ons from designated hedging sets, which are classified according to their supervisory factors and effective notional amounts.
To compute the effective notional amount for each hedging set, institutions must categorise transactions based on their end dates into predefined buckets, as per Table 2. This systematic approach ensures compliance with regulatory standards while accurately reflecting the associated interest rate risk.
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Article 280a Interest rate risk category add-on
1. For the purposes of Article 278, institutions shall calculate the interest rate risk category add-on for a given netting set as follows:

where:
AddOnIR = the interest rate risk category add-on;
j = the index that denotes all the interest rate risk hedging sets established in accordance with point (a) of Article 277a(1) and with Article 277a(2) for the netting set; and
AddOnjIR = the interest rate risk category add-on for hedging set j calculated in accordance with paragraph 2.
2. Institutions shall calculate the interest rate risk category add-on for hedging set j as follows:
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where:
єj = the hedging set supervisory factor coefficient of hedging set j determined in accordance with the applicable value specified in Article 280;