This Quarterly Report is produced by the Market Practice and Regulatory Policy team at ICMA. In the ICMA Quarterly Report for the Fourth Quarter of 2018, the Foreword is by Armin Peter of UBS, a member of the ICMA Board. This is followed by a Message from ICMA’s Chief Executive, Martin Scheck. The Quarterly Assessment is on Brexit cliff-edge risks in international capital markets. There are feature articles on: 10 years after Lehman; the transition to risk-free rates; the Asia-Pacific cross-border secondary market; and covered bonds legislation. The ICMA Quarterly Report also covers other international capital market practice and regulatory developments in the primary markets, secondary markets, repo and collateral markets, green, social and sustainable bond markets, and asset management. These contributions are followed by an international regulatory digest of recent G20 and European financial regulatory reforms, and by a special section on FinTech in international capital markets.