MILAN — An Italian court convicted 13 former bankers from Deutsche Bank, Nomura and Monte dei Paschi di Siena on Friday over derivative transactions that prosecutors say helped the world’s oldest bank conceal huge losses.

The verdict, read in court by the lead judge, Lorella Trovato, also ordered the seizure of 64 million euros, about $70.5 million, from Deutsche Bank and 88 million euros from Nomura as part of the sentence.

Monte dei Paschi reached a settlement of 10.6 million euros with the court in 2016.

The case centers on two controversial derivatives deals, known as Alexandria and Santorini, that Nomura and Deutsche Bank arranged for Monte dei Paschi in 2009.

Prosecutors said the deals helped Monte dei Paschi, which was founded in 1472 and is Italy’s fourth biggest lender, hide more than 2 billion euros of losses it racked up after the costly acquisition of a smaller rival in 2008.