Petrobras (PBR) is one of the stocks most watched by Zacks.com visitors lately. So, it might be a good idea to review some of the factors that might affect the near-term performance of the stock.Shares of this oil and gas company have returned -9.9% over the past month versus the Zacks S&P 500 composite's +1% change. The Zacks Oil and Gas - Integrated - Emerging Markets industry, to which Petrobras belongs, has lost 6.9% over this period. Now the key question is: Where could the stock be headed in the near ...