Argentine investors in Brazil's Petrobras initiated arbitration proceeding

SAO PAULO, Sept 12 (Reuters) - Argentine investors in Brazilian state-run oil company Petroleo Brasileiro SA have initiated an arbitration proceeding against the firm for losses related to Brazil's sprawling Lava Jato corruption probe, the firm said.

In a Wednesday securities filing, Petrobras, as the firm is commonly known, said the arbitration will be hosted by Argentina's Buenos Aires Stock Exchange.

Petrobras said it believed the arbitration claim was "groundless" and that it would "not generate immediate financial or economic impacts" for the company.