A supervisory source told Reuters that redeeming AT1 bonds is a good way to instil confidence in markets if banks have enough capital, which the source said is the case for UniCredit. AT1 bonds are the riskiest type of debt banks can issue, ranking immediately after equity in the event of losses. The decision has disrupted the $275 billion AT1 bond market, which had already seen yields rise in the wake of recent U.S. banking failures. European rules require lenders to put in a request to supervisors to call an AT1 bond at least three months before the due date. AT1 bonds emerged in the wake of the global financial crisis as a way to build up bank capital and absorb losses.

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