Nominations close later today for the post of head of the International Monetary Fund (IMF), with French Finance Minister Christine Lagarde tipped for the job. Mexico's Central Bank Governor Agustin Carstens and his Kazakhstan counterpart Grigory Marchenko are also in the running. The final selection is expected to be announced by 30 June. The post became vacant when Dominique Strauss-Kahn quit last month over sexual assault charges in New York.