In particular, data on the CDO market are far from sufficient. In other areas, for example, with regard to CDSs, different sources publish figures that are difficult to compare. They are often based on surveys carried out by the private sector (for instance, by business associations or rating agencies).
Thus, it is hard to judge whether specific activities could have an impact on the financial system as a whole. We need to discuss, at the international level, how statistics can be improved. Such initiatives can only be successful if all countries with significant market shares participate. They should be coordinated by international organisations like the BIS.