Finance ministers and central bank governors are on Saturday expected to give Rodrigo Rato, managing director of the International Monetary Fund, the green light to draft a plan to give big emerging market economies a greater stake in the fund.

China, South Korea, Turkey and Mexico are expected to be the biggest immediate winners from the shareholding shake-up. Global policymakers hope it will increase the legitimacy of the IMF and bind rising economic powers more tightly into the multilateral financial system.