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For Example : if Risk weighted asset (RWA) increased or decreased this month, which other risk metrics could have influenced RWA to increase or decrease. Also in different situations like, upward trend, sudden increase, downward trend, sudden decrease, neutral or stable RWA. I want to understand and trying to create a document for my reference and learning purpose.

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  • $\begingroup$ very complicated question, RWA is influenced by credit/market/operational risk, etc. $\endgroup$
    – adam
    Feb 25, 2016 at 10:22

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Our paper answers this question in the admittedly simple context of Expected Loss (EL) calculated as the straightforward summation of EAD * PD * LGD from the granular level.

EL here is the surrogate for your RWA, and the risk metrics are the granular data (EAD, PD, LGD).

The paper proposes how changes in EL can then be attributed / apportioned to changes in each of the risk metrics.

Hunt, C.; Taplin, R. Aggregation of Incidence and Intensity Risk Variables to Achieve Reconciliation. Risks 2019, 7, 107. https://www.mdpi.com/2227-9091/7/4/107

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