NEW YORK (TheStreet) -- Teva Pharmaceutical (TEVA), Eni (E), JPMorgan Chase (JPM), Vale (VALE), Petroleo Brasileiro (PBR), Rio Tinto (RIO) could deliver robust gains in the next 12 months, according to Wall Street analysts.These six large-cap stocks span diverse sectors: banking, mining, oil & gas and pharmaceuticals. These stocks have a minimum market capitalization of $30 billion. They should outperform their peers and the broader markets, according to analysts' 12-month price targets. 6. Eni is an integrated oil, gas and petrochemical company that operates in 77 countries. Oil and natural gas production declined 15% during the second quarter of 2011 because of the shutdown of operations in Libya. However, operating profit and net profit rose 8% and 4%, respectively, from the year-earlier quarter. During the first half of 2011, four new fields came on-stream in Congo, Italy and the U.S, the company reports. The company acquired interest in two gas discoveries in the Timor Sea and exploration acreage in Indonesia. Eni also said it has signed an agreement with Sonatrach to pursue shale gas development in Algeria. Eni experienced exploration success during the first half in the U.S., Norway, Venezuela, the U.K. and Angola, adding 415 million barrels to its reserve base. According to consensus 12-month price target of analyst, the stock is expected to gain 55% over the next year. It is trading at a price-to-earnings ratio of 5.8, based on estimated 2011 earnings. Sixty percent of analysts covering the stock give it a buy rating.