(New: Entry, updated prices, further analyst opinion)

FRANKFURT (dpa-AFX) - A potentially expensive aftermath of the Postbank takeover has spoiled the start of the week for Deutsche Bank investors. The bank's shares lost 6.3 percent to 15.49 euros on Monday morning and were thus the clear tail light in the DAX. The shares had already come under pressure on Friday after exceeding the EUR 17 mark for the first time since the end of 2017. They had previously risen by around a third since the start of the year.

In the protracted legal dispute with former shareholders of the acquired Postbank, Deutsche Bank is bracing itself for an additional payment in the billions, as it surprisingly announced on Friday evening. Following corresponding statements by the Koln Higher Regional Court, the bank is expected to set aside 1.3 billion euros in the second quarter.

Analyst Michael Christodoulou from Berenberg Bank therefore spoke of a bumpy road ahead for the bank. Despite the recent good performance in the operating business, this year's sales targets remain a challenge for the Frankfurt-based bank. Although the Postbank dispute would not change the strategy, it would probably have an impact on the plans for capital distributions.

JPMorgan analyst Kian Abouhossein commented that the provisions were a negative surprise, but did not change the long-term positive investment background.