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💱 '''Contingent convertible bond''' — commonly known as a CoCo bond — is a hybrid [[Definition:Capital instrument | capital instrument]] issued primarily by financial institutions, including [[Definition:Insurance carrier | insurers]] and [[Definition:Reinsurance | reinsurers]], that automatically converts into [[Definition:Equity | equity]] or suffers a write-down of principal when a predefined trigger event occurs, such as the issuer's [[Definition:Solvency ratio | solvency ratio]] falling below a specified threshold. In the insurance context, CoCo bonds serve as a mechanism for absorbing losses during periods of severe financial stress, thereby bolstering an insurer's [[Definition:Regulatory capital | regulatory capital]] position without requiring an emergency equity issuance in distressed market conditions. They sit within the broader category of [[Definition:Subordinated debt | subordinated debt]] instruments that regulators recognize as eligible capital under frameworks like [[Definition:Solvency II | Solvency II]] and [[Definition:Swiss Solvency Test (SST) | Switzerland's SST]].

⚙️ The mechanics hinge on the trigger — typically expressed as a capital adequacy ratio falling below a contractually defined level. For a European insurer operating under [[Definition:Solvency II | Solvency II]], the trigger might reference the [[Definition:Solvency capital requirement (SCR) | SCR]] coverage ratio; if it breaches a specified floor, the bond either converts into common shares at a predetermined conversion price (diluting existing shareholders) or is written down partially or entirely (imposing losses on bondholders). The choice between conversion and write-down, and the calibration of the trigger level, significantly affect the instrument's risk profile and pricing. Insurers and reinsurers have used CoCo bonds to optimize their [[Definition:Capital structure | capital structures]], accessing [[Definition:Tier 1 capital | Tier 1]] or [[Definition:Tier 2 capital | Tier 2]] capital recognition while maintaining tax deductibility of coupon payments — a feature that pure equity cannot offer. [[Definition:Rating agency | Rating agencies]] scrutinize these instruments carefully, often notching them several levels below the issuer's senior debt rating to reflect subordination and conversion risk.

🔍 For insurance investors, CoCo bonds issued by banks became an area of acute attention after the 2023 collapse of [[Definition:Credit Suisse | Credit Suisse]], in which approximately CHF 16 billion of Additional Tier 1 CoCo bonds were written down to zero while equity holders still received some recovery through the forced merger with [[Definition:UBS | UBS]]. That outcome challenged longstanding assumptions about the creditor hierarchy and prompted insurers worldwide — many of whom held bank-issued CoCos in their [[Definition:Investment portfolio | investment portfolios]] — to reassess [[Definition:Credit risk | credit risk]] models and concentration limits for such instruments. Regulatory bodies including the [[Definition:European Insurance and Occupational Pensions Authority (EIOPA) | EIOPA]] and national supervisors subsequently intensified scrutiny of how insurers account for and stress-test their CoCo bond exposures. The episode reinforced that while CoCo bonds offer attractive yields and capital efficiency, they carry tail risks that demand sophisticated [[Definition:Enterprise risk management (ERM) | risk management]] and careful attention to the legal terms governing loss absorption.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Convertible bond]]
* [[Definition:Subordinated debt]]
* [[Definition:Solvency capital requirement (SCR)]]
* [[Definition:Tier 1 capital]]
* [[Definition:Capital structure]]
* [[Definition:Credit Suisse]]
{{Div col end}}

Definition:Contingent convertible bond - Revision history

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