The company will issue fixed and floating rate notes coming due in 2017, 2020, 2024 and 2044 with coupon rates ranging from 3.25% to 7.3%, it said in a securities filing late Monday.

Data from Bloomberg indicated it was the largest bond sale thus far of 2014.

Investors have expressed concern over the company's indebtedness, but Petrobras maintains the load is manageable and part of its business and management plan for 2014 to 2018.

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