They could guarantee the losses in the same way as they underwrite the World Bank: each government would provide a modest pro-rata capital infusion and commit the rest in the form of callable capital that would be available if and when losses are actually paid out.
Poderiam garantir as perdas do mesmo modo que garantem o Banco Mundial: cada governo forneceria uma modesta infusão pro-rata de capital e comprometeria o resto na forma de capital resgatável, que seria disponibilizado se e quando as perdas se verificassem na realidade.