NEW YORK (TheStreet) -- Petrobras looks like a risky bet, but one analyst believes the shares represent "a very interesting special situation where the shares could potentially more than double over the next three years." The Brazilian oil giant has seen its shares lose some 70% since the start of September due to a combination of a sharp fall in oil prices and a corruption scandal involving Brazilian politicians and Petrobras executives who have left the company since the allegations came to light. Must Read: Warren Buffett's Top 10 Dividend-Paying Stocks for 2015 The scandal over alleged money laundering, known as "Operation Lavo Jato," which translates to "Car Wash," caused Petrobras to release its third-quarter financial filings more than two months late.