The https://en.wikipedia.org/wiki/Graham_number is also not usually used for financial companies like banks.
For banks and real estate I have decided to use 1 x book value instead of 1,5 x book value which makes more sense for other industries. The Graham Value is the geometric average of 15 x Earnings per Share and Book Value x 1,5 (in this case x 1).
The company is paying out a special dividend of EUR 1,5 / EUR 22,6 = 7% on December 19th 2018.
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