"Gecina's purchase of a company (Bami) which belongs to its own shareholders can only create uncertainty over the correct value of the deal," said Samuel Henry-Diesbach, analyst at Kepler Capital markets.
The Chairman and Chief Executive of Gecina, Joaquin Rivero, and board member Bautista Soler, together own 31 percent of Gecina as well as 84 percent of Bami.
Gecina's shares closed down 11 percent at 35 euros -- their biggest drop since Dec. 22 -- compared with a 2 percent fall in the pan-European FTSEurofirst 300 index .FTEU3.
