5. Brazil's Petroleo Brasileiro S.A. (Petrobras) ( PBR), an integrated oil and gas company, has a 40% upside according to analysts' estimates. The stock was included in this list of energy stock picks with upside. The stock appears bullish based on the money flows, indicating visible investor confidence. On Oct. 19, money flows in the stock stood at $32.25 million. The stock has a P/E of 8.44 as compared to its peers like Exxon Mobil ( XOM) which records a P/E of 12.73. In addition, Petrobras records an operating margin of 23.8% much higher than 9.5% of Exxon. Recently, Blackrock> ( BLK) has increased its stake in Petrobras to 5.01% of the preference shares, leading to the current holding of 185.87 million preference shares and 94.53 million ADRs. Petrobras, which has investments and explorations across several countries, is benefiting from growing domestic demand as well. Besides, Petrobras is in an enviable position as its investment portfolio includes pre-salt reservoirs. Unlike U.S. oil refiners, Petrobras is less vulnerable to price volatilities and uncertainties as the Brazilian government determines prices.