The recent international financial CRISIS, which begun in the middle of 2007 with the elevation of the default on the high risk mortgages (subprime) in the United States, assumed systemic outlines with Lehman Brothers' bankruptcy in September 2008. Its reflexes were felt in the whole world, raising successive public interventions in order to guarantee the bank solvency and to lessen the recessive impacts of the abrupt reduction of the credit. But it has equally renewed the discussion on the "financialized" character of the operations performed by remarkably productive companies, which took advantage of extremely complex instruments in the search for supplemental earnings resulting from the financial leverage.