Brazil's state-owned oil company Petrobras has been linked to the country's endemic corruption in recent years. But for one investor, the simple numbers of investing in the firm win out.

Myles Bradshaw, head of global aggregate fixed income at Amundi, told CNBC that Petrobras' bond valuation was attractive. Currently, Brazilian 30-year paper yields roughly 5 percent, while a 5-year bond in Petrobras yields roughly 7.5 percent. Given that Petrobras is a majority state-owned company, both carry a similar amount of risk.