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Analyzing and Comparing Basel¡¯s III Sensitivity Based Approach for the Interest Rate Risk in the Trading Book

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  • Mabelle Sayah

Abstract

A bank¡¯s capital charge computation is a widely discussed topic with new approaches emerging continuously. Each bank computes this figure using internal methodologies in order to reflect its capital adequacy; however, a more homogeneous model is recommended by the Basel committee to enable judging the situation of these financial institutions and relating different banks among each other. In this paper, we compare different numerical and econometric models to the Sensitivity Based Approach (SBA) implemented by the Basel Committee on Banking Supervision (BCBS) under Basel III in its December 2014 (rev. March 2015) publication in order to compute the capital charge in the trading book. We study the influence of having several currencies and maturities within the portfolio and try to define the time horizon and confidence level implied by Basel¡¯s III approach through an application on bonds portfolios. By implementing several approaches, we are able to find equivalent VaRs to the one computed by the SBA on a pre-defined confidence level (97.5%). However, the time horizon differs according to the chosen methodology and ranges from 1 month up to 1 year.

Suggested Citation

  • Mabelle Sayah, 2016. "Analyzing and Comparing Basel¡¯s III Sensitivity Based Approach for the Interest Rate Risk in the Trading Book," Applied Finance and Accounting, Redfame publishing, vol. 2(1), pages 101-118, February.
    • Handle: RePEc:rfa:afajnl:v:2:y:2016:i:1:p:101-118
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    More about this item

    Keywords

    Capital charge; Sensitivity Based approach; Basel III; bonds portfolio; trading book; interest rate risk;
    All these keywords.

    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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