It's unclear what drove the change at one of the country's largest financial groups.
PM Alexis Tsipras said it was long overdue.
Prime Minister Alexis Tsipras will try to claim victory but the far left sees the vote as another compromise.
French president backs Greek government's efforts to secure debt relief.
Syriza's thin majority is enough to pass new austerity measures
Leaders visit Lesvos, where some 200,000 migrants have landed on an island of 86,000 people.
The Greek prime minister puts two bailout negotiators in charge at the finance ministry.
Greek conservatives concede defeat to left-wing Syriza.
Ten percent of Greeks remain undecided in advance of Sunday's vote.
Two frontrunners slug it out in crucial debate before Sunday's Greek elections