The report comes just as the order book is about to close - orders by institutional investors are due by 3 PM on Thursday - and a day before the IPO price is scheduled to be revealed.

The IPO price was set at EUR 51.5-66 and the number of shares on offer from 50% to 75% minus one share, with the final price and number of shares subject to demand.

Retail investors had until Wednesday to subscribe the shares; 10% of the issue on offer was set aside for them.

If the Bloomberg price proves to be correct, the treasury would get roughly EUR 772m for 75% of the bank, well below expectations and significantly less than in an aborted IPO in 2017.