- This policy briefbuilds on theworkshop EU ETS Reform: Taking Stock and Examining Carbon Price Floor Options,held at the Centrefor European Policy Studies (CEPS) in Brussels on July 3, 2018. The workshop was cosponsored by CEPS and the AHEAD and Mistra CarbonExit projects. While the brief draws on insights from workshop discussions, its views are solely those of the authors. The brief outlinesdifferent perspectives on thepast performanceof the EU Emissions Trading System (ETS)in terms of its allowance price (Section 1), analyzes how the recent reform respondedto related challenges(Section 2), and considers the case for introducinga carbon pricefloor in the EU ETS(Section 3). The main part of the brief (Section 4) identifies five myths in the debate of an EU ETSpricefloorand criticallyconfrontsthem. Section 5 concludes by discussing potential entry points for introducing a carbon price floor in the context of the upcoming EU climate policy process