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The central bank said in a statement that on Thursday it will offer as much as $4 billion with repurchase dates set to Nov. 1 and April 1. It is the second time this week that the bank has resorted to this type of intervention.
The announcement was made after the bank conducted a survey to gauge market demand for dollar lines, traders said.
The Brazilian real plunged 2.3 percent on Thursday to close at 2.4501 per dollar, its weakest level since December 2008.