Bank risk-taking: are contingent convertibles a resolution mechanism?

Archive ouverte : Article de revue

Maati-Sauvez, Christine | Maati, Jérôme

Edité par HAL CCSD ; Institut de Socio-Economie des Entreprises et des Organisations (ISEOR)

International audience. CoCos (contingent convertibles) are recent hybrid securities which are converted into equity when banks are in need of a recapitalization. Our model derives an optimal capital structure endogenously while also allowing for bank risk choice. It shows that CoCos significantly reduce their probability of failure although they cannot completely protect banks against bankruptcy. Moreover, they may destroy wealth due to greater incentives for shareholders to risk-take. . Les CoCos (obligations convertibles contingentes) sont des titres hybrides récents qui sont convertis en fonds propres lorsqu’une recapitalisation de la banque est nécessaire. Notre modélisation permet d’obtenir une structure endogène optimale du capital qui tient compte du niveau de risque associé à la politique d’investissement. Elle montre que les CoCos réduisent la probabilité de défaillance des banques sans l’annuler. Toutefois, les CoCos peuvent inciter les actionnaires à la prise de risque et conduire à une destruction de richesse.

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