Central banks have a decisive role on the markets and the question of their accountability is raised. This is particularly true concerning the powerful Fed which applies a genuine economic policy. For the moment, a kind of observatory made remarks to the benefit of the Congress on it. The House of Representatives voted on 8 August 2012 a text that increases the audit of this policy determined by the single Central Bank. If the Senate also voted this text, then comes a law so that the Central Bank, although independent will be more accountable . Thus the fundamental couple in regulation, namely "independence - accountability" will be more respected.