Deutsche Bank has hit a second Russian businessmen in less than a month with a billion-dollar margin call as some of the country’s richest men continue to struggle with the double problem of falling share prices and large bank debts.

Alexander Zanadvorov, the owner of Russian supermarket chain Seventh Continent, which was last year the subject of interest from US buyout firm TPG, faces having to hand over a 74.8% holding in the company to Deutsche Bank and Nordea Bank Finland after being served with a $1bn (€786m) margin call by the banks.