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Continue to ChatPetrobras, Vale e siderúrgicas caem; MRV volta à renda média e ação sobe 12.12 https://investmax.com.br/iM/investimentos_bolsa_de_valores.asp?bovespa=809719&titulo=Petrobras-Vale-e-siderurgicas-caem-MRV-volta-a-renda-media-e-acao-sobe&s=27&u=www%2Einvestmax%2Ecom%2Ebr%2FiM%2Finvestimentos%5Fbolsa%5Fde%5Fvalores%2Easp%3Fbovespa%3D809719%26titulo%3DPetrobras%2DVale%2De%2Dsiderurgicas%2Dcaem%2DMRV%2Dvolta%2Da%2Drenda%2Dmedia%2De%2Dacao%2Dsobe&t=Petrobras%2C+Vale+e+sider%FArgicas+caem%3B+MRV+volta+%E0+renda+m%E9dia+e+a%E7%E3o+sobe+12%2E12+