The paper “Risk Accounting – The risk data aggregation and risk reporting (BCBS 239) foundation of enterprise risk management (ERM) and risk governance” was published in two separate editions of the Journal of Risk Management in Financial Institutions (JRMFI), Part 1 in the spring and Part 2 in the summer of 2016. In view of the significant interest shown by academics and practitioners during the peer review process, the Journal’s editors subsequently invited risk experts to comment on the published paper. In particular, these thought leaders were asked to comment on whether, in their opinion, the novel concept of a risk metric termed a “Risk Unit” or “RU” represents an appropriately risk-sensitive measure that can be used to both express and aggregate all forms of risk.