The International Monetary Fund (IMF) has shortlisted two candidates to take over as its managing director. French Finance Minister Christine Lagarde and Governor of the Bank of Mexico Agustin Carstens will fight it out for the top job. The post became available after the former head of the IMF Dominique Strauss-Kahn resigned. Mr Strauss-Kahn was arrested in the US last month on charges of an alleged sexual assault. He has denied the charges.