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When Hedges Reduce Counterparty Credit Exposure in Basel RWA

Article Quant Q&A · Author: richpiana
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Summary

The document explains why a hedge does not automatically reduce exposure at default (EAD) for risk-weighted asset calculations. Basel capital requirements separate counterparty credit, market, and operational risk; an ordinary market hedge may offset market risk while leaving counterparty credit exposure intact. Credit exposure may be reduced when trades are with the same counterparty and qualify for treatment within a portfolio netting set.

It points readers to the Basel framework and distinguishes standardized calculations from bank internal models subject to regulatory approval. The answer recommends examining the relevant counterparty credit risk rules and notes that product type affects the applicable exposure method. It does not provide a numerical resolution for the example hedge or set out the detailed eligibility conditions, so the general explanation is not a substitute for applying the rules to a specific netting agreement and product.

Key ideas

  • A market hedge does not by itself reduce counterparty credit exposure for RWA purposes.
  • Trades may offset counterparty exposure when they belong to an eligible netting set with the same counterparty.
  • Basel separates counterparty credit, market, and operational risk in capital calculations.
  • The applicable exposure method depends on the product and regulatory approach.

Tags

Risk managementDerivatives pricingFixed income
Full text
# Effects of hedges on counterparty exposure used for RWA computation


# Effects of hedges on counterparty exposure used for RWA computation












In the context of Basel 2 requirements (BCBS128), how hedges affect the computation of counterparty exposure used in RWA calculation? Specifically, do hedges reduce the amount of exposure (EAD)?

Example: RWA OTC exposure of EAD 100 with a hedge of 2. Is the amount used for RWA computation 98 or 100?

References would be nice to have.

## Answer by Attack68 (score 2, accepted)

https://quant.stackexchange.com/a/45853

So, basically, the answer is no.

For capital requirements Basel has three categories:

a) Counterparty Credit Risk b) Market Risk c) Operation Risk

All RWA calculations are additive.

If your hedge is with the same counterparty then it likely offsets a) and b) and possibly c). If your hedge is only a market hedge then it will only offset b) and possibly some c). Counterparty credit risk (which in my experience can be the dominant factor) is only offset if the trades are with the same counterparty as part of a portfolio netting set.

The Basel Framework: https://www.bis.org/basel_framework/index.htm?m=3%7C14%7C697 does a good job of breaking up sections into readable chunks.

There are two calculations of RWA: a) a standardised approach - the calculation rules are spelled out by Basel b) an internal model based - a bank sets the rules (approved by basel) and cannot be more conservative than those of a fraction of a).

I would suggest you learn a). Therefore you will want to read at least CR20-22, for counterparty credit risk component.

Depending upon what typr of product you have there are many different instructions for example, I care about Interest Rate Swaps, which are typically collateralised OTC derivatives, and in CRE22.81 it tells me to calculate exposure in the method from CRE52, which itself provides a good deal of example calculations.

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.