Shares in Portugal's largest listed bank, Banco Espirito Santo (BES), plunged again Monday as the arrival of new directors failed to shake off worries about the founding family's empire.
After posting an early gain of almost 6.0 percent following news that new managers had taken over, BES shares then nosedived. In afternoon trading they were down 6.86 percent at 0.45 euros.
The PSI-20 index on which the bank's shares are listed was 0.66 percent higher overall.
BES shares were suspended from trading last week after slumping more than 17 percent on Thursday, and they fell by another 5.5 percent on Friday after trading resumed.
Under pressure from Portugal's central bank, BES named on Sunday a new team of directors, with former boss Ricardo Espirito Santo Salgado handing over to economist and former central bank official Vitor Bento.
Officials in Lisbon and other eurozone capitals want to ensure that trouble in Portugal, which rocked financial markets last week, does not spread to other country's financial systems.
Concerns that the bank's troubles could have a wider impact on Portugal -- which only two months ago exited a three-year, 78-billion-euro ($106 billion) international bailout -- also raised questions about the fragility of the eurozone economy.
German Chancellor Angela Merkel voiced concern on Saturday over developments in Portugal, saying that they "demonstrate the speed at which markets take fright and the point at which the euro remains fragile".
ETX Capital analyst Daniel Sugarman noted on Monday, however, that Portuguese bonds had recovered after Prime Minister Pedro Passos Coelho said there would be no state bailout of BES.
The yield on 10-year Portuguese debt on Monday fell by 10 basis points to 3.77 percent compared to Friday.
"Coelho put the onus on private businesses, rather than taxpayers, to assist the bank with its finances," Sugarman said.
Salgado, the patriarch of the bank's founding family and head of the bank for 23 years, tendered his resignation last month following the discovery of accounting irregularities by the bank's holding company.
Analysts suspect that the family-run Espirito Santo International (ESI) covered up a 1.3 billion euro hole in its accounts.
BANCO ESPIRITO SANTO