Shares in Germany’s biggest lender fell as much as 14% on Friday as it became the newest focus of banking concerns amid falling investor confidence. The sell-off was triggered by a jump in the price of Deutsche Bank’s credit default swaps – a financial product that acts as insurance against a possible default by the bank. Germany’s Chancellor said there was no cause for concern about Deutsche Bank, which is “a very profitable company”. It comes less than a week after Credit Suisse was forced into a humiliating takeover by rival UBS, Deutsche Bank’s stock drop sparked some worries that it could be the next iconic European bank to collapse. Both banks are part of 30 globally significant financial institutions, with international rules requiring them to hold higher levels of capital reserves because failure could cause widespread losses.