On the design of sovereign bond-backed securities

Emilio Barucci, Damiano Brigo, Marco Francischello and Daniele Marazzina
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Emilio Barucci: Department of Mathematics, Politecnico di Milano, Piazza Leonardo da Vinci, 20133 Milan, Italy
Marco Francischello: ��Imperial College Business School, London, UK
Daniele Marazzina: Department of Mathematics, Politecnico di Milano, Piazza Leonardo da Vinci, 20133 Milan, Italy

International Journal of Financial Engineering (IJFE), 2022, vol. 09, issue 01, 1-23

Abstract: In this paper, we analyze Sovereign Bond-Backed Securities in the Euro area, concentrating our attention on the return of the different tranches and on their riskiness. We show that as the correlation level among States increases, the yield rate of senior tranches increases while the yield rate of junior tranches decreases. A similar effect is observed when introducing a block dependence structure with high correlation among States belonging to the same block. Introducing a nonzero recovery rate, as opposed to a null recovery rate, decreases the yield rate of senior tranches and increases the yield rate of junior tranches. We compute the loss distribution and the Value at Risk (VaR) associated with the market risk of retaining the different tranches of the bond. We also analyze the possibility of reaching a safe asset through pooling tranches of government bonds of different States. In summary, we show that the issue in reaching a comprehensive and safe offering through the securitization of government bonds is not the safety of senior tranches but the risk of the junior ones.

Keywords: Sovereign Bond-Backed Securities; securitization; tranche; diversification; Euro (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S242478632150033X

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