WHEN HSBC CHAIRMAN Stephen Green recommended in mid-May that global bank regulators impose "quite swingeing increases [in capital requirements] that really do concentrate the minds of management and lead to a scaling back of inappropriate amounts of risk taking in the trading book" he was speaking in his capacity as chairman of the steering committee on regulatory capital for the Institute of International Finance. But his words might just as well have come from any member of the Basle Committee on Banking Supervision. Swingeing increases in capital requirements are very much on their agenda, along with swingeing changes to bank capital (in particular subordinated bank capital) instruments that simply failed to work when the debt crisis hit in 2007. "This is the new world of capital," Prasad Gollakota, head of capital solutions, EMEA at UBS Investment Bank, tells Euromoney. "We dont yet know what the minimum capital requirements are or...