Two of the more promising ideas are particularly worth mentioning. One is for a requirement for contingent capital that converts from debt to equity in times of stress or for comparable arrangements that require firms themselves to provide for back-up sources of capital.
The other is for a special capital or other charge to be applied on firms based on their degree of systemic importance. Many of these initiatives still require much work at the technical level before policy proposals will be ready for a thorough vetting in the national and international regulatory community.