Financial system requires that its main components respectively, markets, financial institutions and infrastructures to be able to absorb disturbances together. The stability also requires that the financial system to facilitate rapid smooth and efficient reallocation of financial resources of savers to investors, the financial risk is analyzed and accurately valued and that it be managed effectively. Given the profound transformations that have suffered financial systems under the action of powerful movements of technological innovation, liberalization and globalization that has occurred in the last decades, the achievement of financial stability is one of the new challenges that face contemporary economies. Financial stability is a natural concern, and lately has become one a priority for central banks, which is leading the national financial systems.