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Brazil's antitrust watchdog investigates Banco Bradesco

(Adds Bradesco and Guiabolso comments)

SAO PAULO, April 30 (Reuters) - Brazil's antitrust watchdog CADE opened an investigation into Banco Bradesco SA for anti-competitive practices against financial startup Guiabolso, according to a CADE statement on Tuesday.

The watchdog said Bradesco may be impeding its clients from connecting Guiabolso's app to their checking accounts.

Bradesco denied in a statement any wrongdoing and said the issue with Guiabolso involved client data security and bank secrecy rules. Guiabolso declined to comment on the matter. (Reporting by Carolina Mandl; Editing by Sandra Maler and Tom Brown)