Deutsche Bank may be trying to steal a march on its rivals by raising nine billion euros of new capital.
Unnamed sources say the stock sale may come as early as next week.
It would make Deutsche Bank, Germany’s biggest finance house, the first bank to raise funds to meet new capital rules.
It is also expected to use the new money to increase its share in Germany’s Postbank.
Financial regulators meet in Switzerland on Sunday to approve the new requirements for all banks to keep more money safe and therefore have less to gamble with. banks would have years to comply; Deutsche Bank’s move would suggest it is trying to be first out of the blocks.