“He was a friend, father and teacher to all of us,” said Kostas Deinopoulos, who set up Optima alongside Roussos 35 years ago.

The firm’s offices remained closed on 1 December, the day of Roussos’ funeral in Voula, Athens.

“The death of an inspiring man such as Antony Roussos has significant effect on all of us,” Optima said in a note to clients.

However,