“We are comfortable with the idea of a bank that puts together finance for infrastructure, because our view is that there is a huge need for infrastructure in emerging markets countries,” David Lipton, the first deputy managing director of the IMF, told CNBC early on Monday.

The $50-billion Asian Infrastructure Investment Bank (AIIB) is being established to meet the need for greater infrastructure investment in lower- and middle-income Asian countries. It comes amid complaints by China and other major emerging economies that they lack influence in institutions such as the IMF, the Asian Development Bank and the World Bank.

Support for the AIIB has gathered speed in Europe this month, with the U.K. the first country to sign up, followed by Germany, France and Italy and then Luxembourg and Switzerland.