That requires global coordination and the role of the US.
Source, in full
In response to Christine Lagarde's statement, "I don't think anybody's asking the opening of the capital account... overnight. ...I don't think anybody's asking financial stability to be questioned by this eruption under unguarded conditions ...of China. So we all have a vested interest in keeping the system stable and solid, and that process to be gradual, as long as the rules are respected."