The Frankfurt stock exchange suspended hiring at the end of February after revenues for the first two months of the year proved weak, but a person close to the process said there was still "no date for an end yet". That could make things tricky if Deutsche Boerse's supervisory board does not extend chief executive Carsten Kengeter's contract, which expires in March 2018, unless it fills the top job with an internal candidate. The decision is likely to hinge on whether Mr Kengeter is charged by prosecutors for allegations of insider trading, sources told Reuters last week - claims that he has insisted will "turn out to be unfounded".