The Risk Concentrations paper is being released in final form and has also been included in the Joint Forum submissions to the Financial Stability Forum to contribute to its work related to the market turmoil. This paper expands on previous reports and explores the extent to which financial conglomerates active in two or more of the banking, securities, and insurance sectors currently identify, measure, and manage risk concentrations at the firm-wide level and across the major risks to which these firms are exposed. The paper also explores how current and emerging risk techniques, including stress testing and scenario analyses, are employed to identify potential concentrations. It also includes observations and lessons drawn from the market turmoil that begin in mid-2007. An annex to the paper contains a summary of current regulatory requirements relating to risk concentrations.