Deutsche Bank shares XE:DBK slumped 8% in Frankfurt trade on Friday, as worries over bank sector health focus on another global systemically important bank. Deutsche Bank’s 5-year credit-default swaps widened on Thursday, in what Reuters reported was the largest one-day rise in its history. Its AT1 bonds have tumbled in value after Switzerland wiped out Credit Suisse’s securities after the state-backed takeover by UBS.

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