Good management of cyberspace requires a system of cyber metrics that are transparent, auditable, practical, scalable and the most difficult: widely agreed upon. To that end, we will evaluate various approaches to cyber risk quantification with the aim of informing the development of a public standard for measuring cybersecurity. One possibility is to use external market performance financial metrics as an indicator of cybersecurity ( Others rely on internal enterprise analysis. As part of our ongoing work we outline the problem in this webinar and suggest the nature of some of the possible responses.