Under the Prudential Regulation Authority’s (PRA) near-final rules in PS9/24, the transition to the Basic Approach for CVA (BA-CVA) introduces a rigorous, formulaic framework for capitalizing counterparty credit spread risk. This technical walkthrough explores the final stages of the regulatory methodology: K Full and K Final.

In the final stages of the Full BA-CVA approach, we move from analyzing individual hedges to calculating . This represents the total capital requirement for a portfolio where all eligible hedges—Single Name (SNH) and Index (IH)—are integrated. It is the mathematical "net" view of your CVA risk profile, incorporating both the benefits of risk mitigation and the penalties for hedging imperfections.

Index Hedges (IH) serve as a primary mitigant for the systematic component of counterparty credit spread risk. Under the PRA's PS9/24 framework, these broad-market instruments allow firms to offset market-wide volatility, provided they adhere to specific mapping rules and the mandatory 0.7 risk weight multiplier.