As soon as things are going a little better for Deutsche Bank and their boss Christian Sewing, the next few sticks fly between his legs.

And from an unexpected side.

The decision of the Federal Court of Justice on charges relating to the current account probably nobody in the banking industry had on the screen - the judgment is explosive, not only for Deutsche Bank.

The bank's CFO puts the immediately foreseeable losses at 300 million euros.

But the consequences could go far beyond that and also affect many other institutes.

In times of negative interest rates, many credit institutions have relied on increasing the fees for checking accounts in recent years. The common practice, that every customer who does not object actively, tacitly accepts the fee increase, appeared to them to be less sensitive than to scare off customers with negative interest rates for everyone. In this respect, the warning from the top banking supervisor that some banks could lose half of their annual net income should not be exaggerated. The institutes are now brooding over how new fees can be introduced in the future if every customer has to actively agree to this. This throws some long-term financial planning into confusion.