Deutsche Post must decide at a crunch meeting on Wednesday whether to cut the price or deal size of the €5.9bn ($7.1bn) initial public offering of Postbank, its retail banking business, or face a possible delay to the float.

The decision comes amid pressure from investors following the aggressive pricing of the IPO last week. The flotation of Postbank, which is due to start trading on Monday as Germany's largest IPO for four years, has been plagued by problems.