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Contingent convertible bonds with the default risk premium

Hyun Jin Jang, Young Hoon Na and Harry Zheng

International Review of Financial Analysis, 2018, vol. 59, issue C, 77-93

Abstract: Contingent convertible bonds (CoCos) are hybrid instruments characterized by both debt and equity. CoCos are automatically converted into equity or written down when a predefined trigger event occurs. The present study quantifies the issuing bank's default risk that only manifests in the post-conversion period for pricing CoCos depending on a loss-absorbing method. This work aims to reflect the distinct features of equity-conversion CoCos - in contrast to a write-down CoCos - in a valuation framework. Accordingly, we propose a model to compute the ratio of common equity Tier 1 (CET1), which is composed of core capital and risky assets, by employing a geometric Brownian motion and a random variable. Then, we formulate the post-conversion risk premium by measuring the probability with which the bank's CET1 ratio breaches a regulatory default threshold after conversion. Finally, we empirically examine a positive value of the post-conversion risk premium embedded in the market prices of equity-conversion CoCos.

Keywords: Contingent convertible bond; Capital-ratio trigger; Conversion time; Equity-conversion CoCo; Post-conversion risk premium (search for similar items in EconPapers)
JEL-codes: G13 C67 (search for similar items in EconPapers)
Date: 2018
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Handle: RePEc:eee:finana:v:59:y:2018:i:c:p:77-93