SAO PAULO (Reuters) - Brazilian bankers' unions said on Tuesday that management from Banco Bradesco SA (>> Banco Bradesco SA) and HSBC Holdings (>> HSBC Holdings plc) promised there would be no mass layoffs due to the sale of HSBC's Brazilian operation, announced this week.

"Both banks promised there would be no mass layoffs and reiterated their openness to dialogue with the labour movement," said Juvandia Moreira, head of the bankers' union in Sao Paulo, in a joint release with state and federal union leaders.

The success of the acquisition, the largest in Bradesco's 74-year history, will depend on how quickly the bank can achieve up to 6 billion Brazilian reais (£1.09 billion) in promised cost savings, analysts say.

(Reporting by Alberto Alerigi Jr.; Editing by Dan Grebler)

Stocks treated in this article : Banco Bradesco SA, HSBC Holdings plc