NEW YORK (TheStreet) -- Petrobras (PBR.A - Get Report) stock is falling 2.89% to $5.37 in afternoon trading on Thursday after oil prices declined as the dollar strengthens and investors cash in on profits following three days of gains.

WTI crude is decreasing 1.41% to $50.51 per barrel on the New York Mercantile Exchange, while Brent crude is declining 1.16% to $51.90per barrel on the Intercontinental Exchange this afternoon.

The drop in oil prices is being limited by production shortages in Nigeria that are being caused by attacks on oil infrastructure, Reuters reports.

Analysts still expect oil prices to be pressured by rising supplies as Canadian production resumes normal levels after the Alberta wildfires and U.S. output increases with higher prices, Reuters added.

Petrobras is a Brazilian state-run energy company.

Separately, Petrobras has a "sell" rating and a letter grade of D at TheStreet Ratings because of the company's deteriorating net income, generally high debt management risk, disappointing return on equity, weak operating cash flow and generally disappointing historical performance in the stock itself.

You can view the full analysis from the report here: PBR.A

TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this article's author.